assembly all

8/8/2019 Assembly All

1/63

Computer Maintenance I: PC Disassembly and Reassembly2003 Texas Trade and Industrial Education

1

Lesson Plan

Course: Computer Maintenance I

Session Title: PC Disassembly and Reassembly

Performance Objective:

Upon completion of this assignment, students will be able to physically disassemble andreassemble a PC.

Specific Objectives:

Boot up the PC to be disassembled and reassembled [verify that it works properly].

Disassemble a PC.

Reassemble a PC.

Boot up the reassembled PC [verify that it works properly].

Preparation

TEKS Correlations:

125.46(c) (3) (E) (F) (G)

demonstrates knowledge of the architecture of a computer system; central processingunits (CPU), storage devices, and peripheral devices; and computer system environmental

and control devices.

125.46(c) (4) (A)

safely use hand and power tools end equipment commonly employed in computertechnologies.

Interdisciplinary Correlations:

Technology Applications Computer Science I:

126.22(c)(1)

(A) demonstrate knowledge and appropriate use of operating systems

(B) appropriately use the various input, processing, output, and primary/secondary storagedevices

126.22(c)(12)


2/63


2

(B) seek and respond to advice from peers and professionals in evaluating the product

(C) debug and solve problems using reference materials and effective strategies

English:

110.xx(7) Reading/comprehension

(A) establish a purpose for reading such as to discover, interpret, and enjoy;

(I) use study strategies such as skimming and scanning, note taking, outlining, and using study-guide questions to better understand texts;

(J) read silently with comprehension for a sustained period of time.

Teacher

References:

1. Cisco Systems Sponsored Curriculum: IT Essentials I: PC Hardware and Software,Chapter 3: Assembling a Computer.

Instructional Aids:

1. PowerPoint presentation: PC Disassembly and Reassembly.2. Micro 2000 Video TroubleShooting Vol 3: PC Assembly & Configuration.3. Lab Sheet for Disassembly and Reassembly of a PC.4. PC Disassembly and Reassembly exam.

Materials Needed:

1. Standard computer technician tool kit (With wrist-strap). [For each pair of students]2. Copies of Lab Sheet for Disassembly and Reassembly of a PC. [For each student]

Equipment Needed:

1. Projection system to display PowerPoint presentation [PC/Monitor, PC/Projector, etc.]2. VCR and Television to show PC Assembly & Configuration video.3. One PC for each two students; for labs.

Learner

1. Students should read appropriate curriculum material for how to disassemble/assemble a

PC [depending on the text/curriculum being used for this course]. This lesson can be taughtwith only the PowerPoint presentation, and the equipment needed outlined above.

Introduction

Introduction (LSI Quadrant I):

Understanding how a PC is assembled and disassembled is a key component in the training for


3/63

a computer technician. Knowledge of how the computer parts fit will help the technician solverepair and upgrade problems.

IDE storage devices, such as the hard drive and CD-ROM drive, are the most common typeof storage devices installed in todays PC. How can the computer technician ensure the cablingfor these devices are properly oriented?

Make sure that the colored stripe [usually red, sometimes blue], is oriented on the number 1pin of the IDE port [both on the motherboard and the drive]. On the drives IDE port, thenumber one pin is usually closest to the power connector.

Outline

Outline (LSI Quadrant II):

1. Introduce students to the computer assembly process to include:a. Computer chassis (cases)b. Power suppliesc. Motherboard configurationd. Configuration of connectorse. CPU interfacesf. RAM installationg. Installing hard drives and/or CD-ROMsh. Connecting floppy drivesi. First boot after assembly

2. Show a video [or give demonstration], of the assembly of a PC3. Students complete lab demonstrations including:

a. Lab 1: Disassembly of PCb. Lab 2: Reassembly of PC

Application

Guided Practice (LSI Quadrant III):

1. Teacher shows and demonstrates each lab principle.

2. Teacher maintains direct supervision in the lab providing guidance when warranted.

Independent Practice (LSI Quadrant III):

1. Students work in pairs on lab assignments; demonstrating their skills in identifying anddiscussing the various lab requirements and results.

Summary

Review (LSI Quadrants I and IV):

1. Ask students summary questions.a. What are the main types of computer cases? [Desktop, mini-tower, mid-tower, and

full tower]


3


4/63


4

b. What are the two types of power supplies? [AT and ATX]c. What is the voltage for the red and yellow wires of a power connector? [Red is 5

volts and yellow is 12 volts]2. Revisit the steps the students went through to reassemble the PC.

Evaluation

Informal Assessment (LSI Quadrant III):

1. Teacher will monitor student progress during independent practice and provide independentre-teach/redirection as needed.

Formal Assessment (LSI Quadrant III, IV):

1. Administer an objective multiple-choice test.

Extension/Enrichment (LSI Quadrant IV):

1. Students that have mastered the lab assignments, can peer-tutor students [one-on-one] thatare having difficulty with the disassembly or assembly of the PC.


5/63

2003 Texas Trade and Industrial Education

ComputMaintenanc

PC Disassembly aReassem


6/63

2003 Texas Trade and Industrial Education Computer Maintenance I: PC Disassembly and Rea

Enabling Objectives

Computer Chassis (Cases)

Power Supplies

Configuring the Motherboard

Configuring the Connectors CPU Interfaces

RAM

Installing a Hard Drive or

CD-ROM Connecting Floppy Drives

First Boot After Assembly


7/63


Computer Chassis (Case

There are four main types of computer cases

Desktop

Mini-tower

Mid-tower

Full tower

Whether buying a tower or desktop, it is reco

conforms to the ATX standard and has at leapower supply (300 watts is ideal.)

The desktop case is considered the most diff


8/63


Power Supplies

The power supply is one of the most important pa

be understood. The power supply unit provides el

every component inside the system unit.

The power supply plays the critical role of convert

electrical power (AC), into DC required by the com

computer.

There are two basic types of power supplies:

AT power supplies Designed to support AT-comp

ATX power supplies Designed according to newe

specifications to support the ATX motherboard.


9/63


Power Supplies (Continu

There are two major distinctions between the

the new ATX power supplies.

The AT power supply has two 6-pin mothe

connectors (P8/P9)

The black ground wires of these connec

the middle of the motherboard connecto

The ATX power supplies use a single 20-p

connector (P1).

A


10/63


Power Supplies (Continue

In the ATX-compatible power supply, the cooling f

through the case from the front and exhausts it ou

power supply unit.

The AT design pulls air in through the rear of the

and blows it directly on the AT motherboard.

The power supply produces four (five in the ATX)

well-regulated DC voltage for use by the system c

These are +5V, -5V, +12V, and -12V.

In ATX power supplies, the +3.3V level is also pro

by the second-generation Intel Pentium processor


11/63


Configuring the Motherbo

Always wear an anti-static wrist strap when working on

components of a PC

An exception would be when working on the monito

dangerous.

Configuring the motherboard typically means the follow

Installing the CPU

Installing the heat sink and fan

Installing RAM

Connecting the power supply cables to the motherb

connectors and connecting miscellaneous connecto

switches and status lights on the front case panel.

Setting the system BIOS


12/63


Configuring the Connect

For the disk controllers, always remember tha

stripe on the data cable is pin-1.

Most modern connectors are "keyed" by a mi

blocked connector, so they cannot be fitted th

Usually, the colored wire(s) in a power cable

the white or black wire(s) are ground or nega

Ground wires are usually black

5 volt wires are usually red

12 volt wires are usually yellow


13/63


CPU Interfaces

There are two main types of CPU interfac

Socket type (e.g., socket 7) - Socket 7 ha

standard interface, although the newer sys

using different sockets. It is the only interfaleast one generation of Intel Pentium proc

I) as well as AMD and Cyrix chips.

AMD Athlon series CPUs require a Socket A

Socket 7


14/63


CPU Interfaces (Continue

There are two main types of CPU interfac

Slot type (e.g., slot 1.) - Slot type interface

similar to expansion cards. Slot 1 is the Si

Contact (SEC) interface used only by the Iprocessor family.

Slot Type


15/63


RAM

There are two types of memory modules use

72-pin Single In-line Memory Module (SIMM)

Currently the most common SIMM size

168-pin Dual In-line Memory Module (DIMM) Important

When DIMM sizes are mixed on the motherboato remember to put the DIMM with the largest mfirst bank.

Each bank of memory for a SIMM has two socthe first bank before moving onto the next.

Additionally, each bank must be filled with RAM mthe same access time and size.


16/63


RAM (Continued)

When using other types of memory modules

Inline Memory Modules (RIMMs) know that o

considerations have to be taken into account

Unlike DIMMs and SIMMs, RIMM modules usRambus Memory Chips (RDRAM).

Some systems require that RIMM modules b

identical pairs, and others allow single RIMM

Information on specific memory types can be

manuals, the motherboard manual or the ma

websites.


17/63



CD-ROM

Attaching the hard drive and CD-ROM are ba

Connection to the primary or secondary IDE

40 pin ribbon cable.

First, the jumper settings should be properly

The designation of a hard drive or CD-ROM d

master or slave is generally determined by th

configuration, not by the order in which the dr

chained to the other drive.


18/63



CD-ROM (Continued)

The only exception to the master or slave des

drive has its jumper set to "cable select" and

and ribbon cable support cable select.

A cautionary note: Moving the computer withcan damage the hard drive.

If after you assemble a PC, and load the ope

you notice the hard drive activity LED is not li

have the LED plug connected incorrectly for nall.


19/63


Connecting Floppy Drive

The floppy drive exchanges data with the

devices, including the microprocessor, via

ribbon (data) cable

Usually, a red stripe on the edge of the c

pin-1. Lining the red-stripe edge with pin-

connector or drive controller interface ass

alignment.

The FD LED light will remain on if the colo

connected to pin 1.


20/63


Connecting Floppy Drive

Current system BIOS versions can support u

drives on one controller via a daisy chain cab

Cable pin-outs 10 through 16 are cross-wired

middle drive connector and end drive connec

twist that reverses the Drive Select (DS) confdrive plugged into the end connector of the ri

This feature, called cable select, automatically

drive on the middle connector as Drive B and

end connector as Drive A.


21/63


First Boot After Assembl

Post codes may be displayed indicating prob

up. An example might be: Post code 3xx [in

error].

Entering the CMOS setup utility can vary frommanufacturer to anothersome examples are

Delete key

F1 key

Alt + F1 key, etc.


22/63


First Boot After Assembl

If you need to clear a password set [and forg

you can usually use the CMOS reset jumper

motherboard to clear the unwanted password

You may need to set the boot sequence in thwant the PC to look for a bootable floppy first

Select: A, C, CD-ROM as the sequence


23/63


Summary


Power Supplies


Configuring the Connectors CPU Interfaces

RAM


CD-ROM Connecting Floppy Drives



24/63

2003 Texas Trade and Industrial Education 1

Computer

Maintenance

PC Disassembly and

Reassembly


25/63

2003 Texas Trade and Industrial Education Computer Maintenance I: PC Disassembly and Reassembly 2

Enabling Objectives


Power Supplies


Configuring the Connectors

CPU Interfaces

RAM


CD-ROM

Connecting Floppy Drives



26/63


27/63


Power Supplies

The power supply is one of the most important parts that needs to

be understood. The power supply unit provides electrical power forevery component inside the system unit.

The power supply plays the critical role of converting commercial

electrical power (AC), into DC required by the components of the

computer.


AT power supplies Designed to support AT-compatible motherboards.

ATX power supplies Designed according to newer ATX design



28/63


Power Supplies (Continued)

There are two major distinctions between the legacy AT and


The AT power supply has two 6- pin motherboard power

connectors (P8/P9)

The black ground wires of these connectors must be in

the middle of the motherboard connector

The ATX power supplies use a single 20- pin power

connector (P1).

AT ATX


29/63



In the ATX-compatible power supply, the cooling fan pulls air

through the case from the front and exhausts it out the rear of thepower supply unit.

The AT design pulls air in through the rear of the power supply unit


The power supply produces four (five in the ATX) different levels of

well-regulated DC voltage for use by the system components.


In ATX power supplies, the +3.3V level is also produced and is usedby the second-generation Intel Pentium processors.


30/63



Always wear an anti-static wrist strap when working on the electronic

components of a PC

An exception would be when working on the monitor this could be very

dangerous.

Configuring the motherboard typically means the following:

Installing the CPU


Installing RAM

Connecting the power supply cables to the motherboard power

connectors and connecting miscellaneous connectors to the correct

switches and status lights on the front case panel. Setting the system BIOS


31/63



For the disk controllers, always remember that a colored

stripe on the data cable is pin- 1.

Most modern connectors are "keyed" by a missing pin or a

blocked connector, so they cannot be fitted the wrong way.

Usually, the colored wire(s) in a power cable are positive and

the white or black wire(s) are ground or negative.





32/63


CPU Interfaces

There are two main types of CPU interfaces.

Socket type (e.g., socket 7)- Socket 7 has been the

standard interface, although the newer systems are now

using different sockets. It is the only interface used by at

least one generation of Intel Pentium processors (Pentium


AMD Athlon series CPUs require a Socket A connector

Socket ASocket 7


33/63


CPU Interfaces (Continued)

There are two main types of CPU interfaces. (Cont.)

Slot type (e.g., slot 1.) - Slot type interfaces use a slot

similar to expansion cards. Slot 1 is the Single Edge

Contact (SEC) interface used only by the Intel Pentium II

processor family.

Slot Type


34/63


RAM

There are two types of memory modules used on most PCs.

72- pin Single In- line Memory Module (SIMM) cards.


168- pin Dual In- line Memory Module (DIMM) cards

Important

When DIMM sizes are mixed on the motherboard, it is importantto remember to put the DIMM with the largest memory size in thefirst bank.

Each bank of memory for a SIMM has two sockets. You must fillthe first bank before moving onto the next.

Additionally, each bank must be filled with RAM modules that havethe same access time and size.


35/63


RAM (Continued)

When using other types of memory modules such as Rambus

Inline Memory Modules (RIMMs) know that other

considerations have to be taken into account.

Unlike DIMMs and SIMMs, RIMM modules use only the Direct

Rambus Memory Chips (RDRAM).

Some systems require that RIMM modules be added in

identical pairs, and others allow single RIMMs to be installed.

Information on specific memory types can be found in their

manuals, the motherboard manual or the manufacturer

websites.


36/63



CD-ROM

Attaching the hard drive and CD- ROM are basically similar.

Connection to the primary or secondary IDE interface is with a


First, the jumper settings should be properly set.

The designation of a hard drive or CD- ROM drive as either

master or slave is generally determined by the jumper

configuration, not by the order in which the drive is daisy-



37/63



CD-ROM (Continued)

The only exception to the master or slave designation is if the

drive has its jumper set to "cable select" and both the system


A cautionary note: Moving the computer with the power on

can damage the hard drive.

If after you assemble a PC, and load the operating system,

you notice the hard drive activity LED is not lit up; you may

have the LED plug connected incorrectly for not connected at

all.


38/63



The floppy drive exchanges data with the motherboard

devices, including the microprocessor, via a 34-pin flatribbon (data) cable

Usually, a red stripe on the edge of the cable identifies

pin-1. Lining the red-stripe edge with pin-1 of the drive

connector or drive controller interface assures a correct

alignment.

The FD LED light will remain on if the colored stripe is not

connected to pin 1.


39/63



Current system BIOS versions can support up to two floppy

drives on one controller via a daisy chain cable arrangement.

Cable pin- outs 10 through 16 are cross- wired between the

middle drive connector and end drive connector, producing a

twist that reverses the Drive Select (DS) configuration of the

drive plugged into the end connector of the ribbon cable.

This feature, called cable select, automatically configures the

drive on the middle connector as Drive B and the drive on the



40/63



Post codes may be displayed indicating problems with boot-

up. An example might be: Post code 3xx [indicates keyboard

error].

Entering the CMOS setup utility can vary from one BIOS

manufacturer to anothersome examples are:

Delete key

F1 key

Alt + F1 key, etc.


41/63



If you need to clear a password set [and forgotten], in CMOS;

you can usually use the CMOS reset jumper on the

motherboard to clear the unwanted password.

You may need to set the boot sequence in the CMOS. If you

want the PC to look for a bootable floppy first:



42/63


Summary


Power Supplies



CPU Interfaces

RAM


CD-ROM




43/63

2003 Texas Trade and Industrial Education 1

Computer

Maintenance

PC Disassembly and

Reassembly

2003 Tex as Tr ade and Indus tr ial Educ at ion Com put er Mai nt enanc e I : PC Di sas sem bl y and Reas sem bl y 2

Enabling Objectives


Power Supplies



CPU Interfaces

RAM


CD-ROM



2003 Tex as Tr ade and Indus tr ia l Edu cat ion C om put er Ma int enanc e I : P C D is as sembl y a nd Reas semb ly 3


There are four main types of computer cases:

Desktop

Mini-tower

Mid-tower

Full tower

Whether buying a tower or desktop, it is recommended that it

conforms to the ATX standard and has at least a 250-watt

power supply (300 watts is ideal.)

The desktop case is considered the most difficult to upgrade.2003 Tex as Tr ade and Indus tr ial Educ at ion Com put er Mai nt enanc e I : PC Di sas sem bl y and Reas sem bl y 4

Power Supplies

The power supply is one of the most important parts that needs to

be understood. The power supply unit provides electrical power for

every component inside the system unit.

The power supply plays the critical role of converting commercial

electrical power (AC), into DC required by the components of the

computer.


AT power supplies Designed to support AT-compatible motherboards.

ATX power supplies Designed according to newer ATX design




There are two major distinctions between the legacy AT and


The AT power supply has two 6-pin motherboard power

connectors (P8/P9)

The black ground wires of these connectors must be in

the middle of the motherboard connector

The ATX power supplies use a single 20-pin power

connector (P1).

AT ATX2003 Tex as Tr ade and Indus tr ial Educ at ion Com put er Mai nt enanc e I : PC Di sas sem bl y and Reas sem bl y 6


In the ATX-compatible power supply, the cooling fan pulls air

through the case from the front and exhausts it out the rear of the

power supply unit.

The AT design pulls air in through the rear of the power supply unit


The power supply produces four (five in the ATX) different levels of

well-regulated DC voltage for use by the system components.


In ATX power supplies, the +3.3V level is also produced and is used

by the second-generation Intel Pentium processors.


44/63



Always wear an anti-static wrist strap when working on the electronic

components of a PC

An exception would be when working on the monitor this could be very

dangerous.

Configuring the motherboard typically means the following:

Installing the CPU


Install ing RAM

Connecting the power supply cables to the motherboard power

connectors and connecting miscellaneous connectors to the correct

switches and status lights on the front case panel.

Setting the system BIOS

2003 Tex as Tr ade and Indus tr ial Educ at ion Com put er Mai nt enanc e I : PC Di sas sem bl y and Reas sem bl y 8


For the disk controllers, always remember that a colored

stripe on the data cable is pin-1.

Most modern connectors are "keyed" by a missing pin or a

blocked connector, so they cannot be fitted the wrong way.

Usually, the colored wire(s) in a power cable are positive and

the white or black wire(s) are ground or negative.





CPU Interfaces

There are two main types of CPU interfaces.

Socket type (e.g., socket 7) - Socket 7 has been the

standard interface, although the newer systems are now

using different sockets. It is the only interface used by at

least one generation of Intel Pentium processors (Pentium


AMD Athlon series CPUs require a Socket A connector

Socket ASocket 7

20 03 T ex as T ra de a nd I nd us tr ia l E du ca ti on C om pu te r M ai nten an ce I : P C D is as se mb ly a nd R ea ss em bl y 1 0

CPU Interfaces (Continued)

There are two main types of CPU interfaces. (Cont.)

Slot type (e.g., slot 1.) - Slot type interfaces use a slot

similar to expansion cards. Slot 1 is the Single Edge

Contact (SEC) interface used only by the Intel Pentium II

processor family.

Slot Type


RAM

There are two types of memory modules used on most PCs.

72-pin Single In-line Memory Module (SIMM) cards.


168-pin Dual In-line Memory Module (DIMM) cards

Important

When DIMM sizes are mixed on the motherboard, it is importantto remember to put the DIMM with the largest memory size in thefirst bank.

Each bank of memory for a SIMM has two sockets. You must fillthe first bank before moving onto the next.

Additionally, each bank must be filled with RAM modules that havethe same access time and size.


RAM (Continued)

When using other types of memory modules such as Rambus

Inline Memory Modules (RIMMs) know that other

considerations have to be taken into account.

Unlike DIMMs and SIMMs, RIMM modules use only the Direct

Rambus Memory Chips (RDRAM).

Some systems require that RIMM modules be added in

identical pairs, and others allow single RIMMs to be installed.

Information on specific memory types can be found in their

manuals, the motherboard manual or the manufacturer

websites.


45/63



CD-ROM

Attaching the hard drive and CD-ROM are basically similar.

Connection to the primary or secondary IDE interface is with a


First, the jumper settings should be properly set.

The designation of a hard drive or CD-ROM drive as either

master or slave is generally determined by the jumper

configuration, not by the order in which the drive is daisy-




CD-ROM (Continued)

The only exception to the master or slave designation is if the

drive has its jumper set to "cable select" and both the system


A cautionary note: Moving the computer with the power on

can damage the hard drive.

If after you assemble a PC, and load the operating system,

you notice the hard drive activity LED is not lit up; you may

have the LED plug connected incorrectly for not connected at

all.



The floppy drive exchanges data with the motherboard

devices, including the microprocessor, via a 34-pin flat

ribbon (data) cable

Usually, a red stripe on the edge of the cable identifies

pin-1. Lining the red-stripe edge with pin-1 of the drive

connector or drive controller interface assures a correct

alignment.

The FD LED light will remain on if the colored stripe is not

connected to pin 1.



Current system BIOS versions can support up to two floppy

drives on one controller via a daisy chain cable arrangement.

Cable pin-outs 10 through 16 are cross-wired between the

middle drive connector and end drive connector, producing a

twist that reverses the Drive Select (DS) configuration of thedrive plugged into the end connector of the ribbon cable.

This feature, calledcable select, automatically configures the

drive on the middle connector as Drive B and the drive on the




Post codes may be displayed indicating problems with boot-

up. An example might be: Post code 3xx [indicates keyboard

error].

Entering the CMOS setup utility can vary from one BIOS

manufacturer to anothersome examples are:

Delete key

F1 key

Alt + F1 key, etc.



If you need to clear a password set [and forgotten], in CMOS;

you can usually use the CMOS reset jumper on the

motherboard to clear the unwanted password.

You may need to set the boot sequence in the CMOS. If you

want the PC to look for a bootable floppy first:



46/63


Summary


Power Supplies



CPU Interfaces

RAM


CD-ROM




47/63

Computer Maintenance

PC Disassembly and Reassembly

Computer Maintenance I: PC Disassembly and Reassembly Lab 12003 Texas Trade and Industrial Education

1

LAB 1 Disassemble PC

Objectives:

Disassemble a generic PC Verify the correct orientation of interface cables

Background:

In this procedure you will start a computer to verify that it is operatingproperly. Then you will disassemble the computer. You will go throughall the steps of disassembly.

Most PCs are capable of working with several different types of diskstorage devices. The drives that are normally included as standardequipment with a PC are a 3 1/2 inch floppy disk drive (FDD), a multi-

gigabyte hard disk drive (HDD), and a CD-ROM drive. These units cantypically be found in the front section of the system unit.

Resources:

You will work in teams. The following resources will be required:

PC Tool Kit Anti Static Wrist Strap Personal computer (PC) Operating system installed (MSDOS, MS Windows

95/98/2000/Millennium)

NOTE: This lab assumes an AT type PC is used. If an ATX type PC isused some modifications might need to be made in the step-by-step

procedures. I.e. the video and input/output ports may be located on themotherboard instead of interface cards.

Step 1 Booting up the computer

a. Push the power button to turn the computer on. The computer should do aquick memory test (some numbers will count on the screen)

b. The computer will boot up to a MS DOS screen and should show a C prompt

that should look something like: C:> c. Push the power button to turn the computer off

Step 2 Identify adapter cards

a. Unplug the power cord from the back of the computer b. Remove the screws on the back panel of the computer cover c. Take off computer cover d. Identify the video card. It is the one that the monitor is plugged into


48/63




2

e. Write down the slot that it is plugged into in Table 1-1. Slots are numberedfrom right to left starting at slot 1 [looking from front of computer to back]

f. Identify the serial port mount. It is the one with a D25 pin male port and a D9pin male port.

i. Write down the slot that it is plugged into in Table 1-1j. Identify the parallel port mount. It is the one with a D25 pin female port. k. Write down the slot that it is plugged into in Table 1-1

Step 3 Disconnect external cables

a. Disconnect the keyboard from the back of the computer b. Disconnect the mouse (PS/2 or Serial) c. Disconnect the video cable

Step 4 Disconnect all internal ribbon cables

a. Disconnect the IDE ribbon cable from the hard drive b. Disconnect the IDE ribbon cable from the CD-ROM c. Disconnect the IDE ribbon cable(s) from the system board d. Disconnect the FDD ribbon cable from the floppy disk drive e. Disconnect the FDD ribbon cable from the system board f. Remove all the ribbon cables from the computer

Step 5 Disconnect power supply connections

a. Disconnect the power connector from the hard drive b. Disconnect the power connector from the CD-ROM

c. Disconnect the power connector from the floppy drive d. Disconnect the power connector from the tape drive e. Disconnect the power connectors from the system board [notice the

orientation]

Step 6 Remove the adapter cards

a. Unscrew the video card from the back panel, and then remove it and place itinto an anti-static bag

b. Unscrew the serial mount from the back panel, and then remove the ribboncables from the system board [notice the orientation]

c. Repeat step c to the parallel mount.

d. Unscrew any other adapter cards that might be installed in this PC andremove them from the PC.

Step 7 Disconnect all front panel connections

a. Remove the power switch connector b. List the color of the wires in Table 1-2 c. Remove the speaker connector d. List the color of the wires in Table 1-2


49/63




3

e. Remove the power LED connector f. List the color of the wires in Table 1-2 g. Remove the hard drive LED connector h. List the color of the wires in Table 1-2

i. Remove the reset switch connectorj. List the color of the wires in Table 1-2

Step 8 Remove drives from chassis

a. Remove the hard drive [notice type of screws used] b. Remove the CD-ROM drive [notice type of screws used] d. Remove the Floppy drive [notice type of screws used]

Step 9 Remove system board mount and system board

a. Remove screws from the system board mount. b. Pull system board mount and system board from chassis. c. Remove system board mounting screws from system board d. Remove system board.

Step 10 Remove Power Supply

a. Remove switch mounting screw from switch mount at front of chassis b. Remove four screws from back of chassis that hold the power supply onto the

chassis c. Remove the power supply


50/63




1

LAB 2 Reassemble PC

Objectives:

Reassemble a generic PC [disassembled in Lab 1] Verify the correct orientation of interface cables

Background:

In this procedure, you will reassemble the PC that was disassembled inLab 1. You will go through all the steps of reassembly. Afterreassembling the PC, you will start the computer to verify that it isoperating properly

Resources:

You will work in teams. The following resources will be required:

PC Tool Kit Anti Static Wrist Strap Disassembled Personal computer (PC) Operating system installed on hard drive (MSDOS, MS Windows

95/98/2000/Millennium)

NOTE: As in Lab 1, this lab assumes an AT type PC is used. If an ATXtype PC is used some modifications might need to be made in the step bystep procedures. I.e. the video and input/output ports along with the IDEports may be located on the motherboard instead of interface cards.

Step 1 Install Power Supply

a. Place the power supply back into the chassis

b. Insert four screws through back of chassis that hold the power supply onto thechassis

a. Attach switch mounting screw through switch mount at front of chassis

Step 2 Attach system board mount and system board

a. Place system board on system board mounts. b. Install system board mounting screws through system board

c. Install system board mount and system board into chassis. d. Install screws through the system board mount.


51/63




2

Step 3 Attach all front panel connections [See Table 1-2, Lab 1 if Needed]

a. Find the speaker connection and connect it to the motherboard where it islabeled Speaker.

c. Find the power LED connector and connect it to the motherboard where it islabeled Power LED.

d. Find the hard-disk drive LED connector and connect it to the motherboard [orinterface card] where it is labeled HDD LED.

i. Find the reset switch connector and connect it to the motherboard where it islabeled Reset.

Step 4 Install drives into chassis

a. Install the CD-ROM drive [remember type of screws used from Lab 1] b. Install the Floppy drive [remember type of screws used from Lab 1] c. Install the hard drive [remember type of screws used from Lab 1]

Step 5 Install the adapter cards

Make sure the cards are lined up properly with the slots. It will require a firm push to getthe cards reseated in the motherboard expansion slot.

a. Install the video card into the slot recorded in Table 1-1 [Lab 1], and screw itinto the back panel

b. Repeat step a to the network card c. Repeat step a to the sound card d. Repeat step a to all other adapter cards removed in Lab 1.

Step 6 Connect power supply connections

a. Connect the power connectors to the system board [notice the orientation] b. Connect the power connector to the CD-ROM c. Connect the power connector to the floppy drive d. Connect the power connector to the hard drive

Step 7 Connect all internal ribbon cables

a. Connect the floppy disk drive ribbon cable to the floppy disk drive b. Connect the floppy ribbon cable to the system board, striped side to pin 1

c. Connect the hard disk drive cable to the motherboard in the Primary IDEcontroller, striped side to pin 1.

d. Plug the middle of the connector into the hard drive, striped side to pin 1, andplug the end into the CD-Rom drive, striped side to pin 1. [If there were two IDEcables, then plug the second cable into the motherboards Secondary IDEcontroller and then to the CD-ROM]


52/63




3

Step 8 Connect external cables

a. Plug the keyboard into the keyboard connector. Make sure the orientation iscorrect, otherwise you could bend pins and ruin the keyboard.

b. Plug the mouse (PS/2 or Serial) into the port you removed it from. c. Plug the monitor into the video card. The connector is keyed and can only be

plugged in one way. Be careful not to bend pins, as this will ruin the monitor. d. Plug in the power cord. e. Replace the cover of the computer. f. Replace the cover screws.

NOTE: Assembly is complete. You need to reboot the computer to see if it is stillworking properly.

Step 9 Booting up the computer

a. Push the power button to turn the computer on. The computer should do aquick memory test (some numbers will count on the screen)

b. The computer will boot up to a MS DOS screen and should show a C promptthat should look something like: C:>

c. Push the power button to turn the computer off

Team Member 1:______________________________________________________

Team Member 2:______________________________________________________

Team Member 3:______________________________________________________

Team Member 4:______________________________________________________


53/63




4

Table 1-1

Adapter Card Slot

Video Card:

Network Card:

Serial Port Mount:

Parallel Port Mount:

Table 1-2

Cable Color/Orientation

Power Switch:

Speaker:

Power LED:

IDE LDE:

Reset:

Team Member 1:______________________________________________________

Team Member 2:______________________________________________________

Team Member 3:______________________________________________________

Team Member 4:______________________________________________________


54/63

Computer MaintenancePC Disassembly and Reassembly

Computer Maintenance I: PC Disassembly and Reassembly Exam2003 Texas Trade and Industrial Education

1

Student Name: __________________________ Date: __________

Question 1: How many SIMMs does it take to make up a bank in a Pentium classmachine?

A. 1B. 2C. 3D. 4

Question 2: Where is the twist on the floppy drive cable located?

A. after the last connectorB. before the first connectorC. between the B drive and the motherboardD. between the drive A and B connectors

Question 3: Which of the following statements regarding Dual Inline Memory Module(DIMMs) is valid?

A. The smallest capacity DIMM must be installed in the first bank.B. The largest capacity DIMM must be installed in the first bank.C. The DIMMs must be installed in pairs.D. The DIMMs may be installed on any bank on the motherboard.

Question 4: What does the POST code 3xx refer to?

A. memory error

B. keyboard errorC. hard drive errorD. system board error

Question 5: Moving the computer with the power on is most likely to damage whichcomponent?

A. power supplyB. monitorC. hard driveD. video card

Question 6: Which processor family uses a Socket A connector?

A. AMD AthlonB. Intel 486C. Intel Pentium IIID. Intel Pentium II


55/63



2

Question 7: Which term describes the group of memory slots that RAM is installed in?

A. slotB. busC. DIMMD. bank

Question 8: How many pins are on an ATX motherboard power connector?

A. 8B. 10C. 12D. 20

Question 9: How are hard drives configured to be a master or slave drive?

A. with CMOS settings

B. with BIOS settingsC. during the partitioning of the drivesD. with jumpers

Question 10: Which of the following computer components is dangerous to work withwhile wearing an anti-static wrist strap?

A. floppy driveB. motherboardC. monitorD. hard drive

Question 11: What does the colored stripe on a data cable represent?

A. terminationB. pin 1C. pin 40D. a keyed cableE. pin 34

Question 12: What is the most common SIMM size currently used in computers?

A. 168 pinB. 30 pin

C. 72 pinD. 32 pinE. 184 pins


56/63



3

Question 13: How should AT power supply P8 and P9 connectors be connected to themotherboard?

A. The P8 connector should be towards the back of the computer.B. The P9 connector should be plugged into the motherboard first.C. The black wires of P8 and P9 should be in the middle of the connector.

D. The red wires of P8 and P9 should be in the middle of the connector.

Question 14: What is the purpose of the jumpers on an IDE hard drive?

A. The jumpers set the termination of the hard drive.B. The jumpers determine the drive letter of the hard drive.C. The jumpers determine if the hard drive will be a master or slave drive.D. The jumpers set the ID of the hard drive.

Question 15: Which of the following computer problems will cause the floppy drive lightto stay on constantly?

A. The CMOS is setup incorrectly for the floppy drive.B. The floppy drive doesn't have a data cable attached to it.C. The data cable colored stripe is not connected to pin 1 on the floppy drive.D. The floppy drive is attached to the middle of the data cable.

Question 16: How many pins are on the connector of an IDE hard drive?

A. 40B. 50C. 34D. 68

Question 17: How many pins are on an AT motherboard power connector?

A. 8B. 10C. 12D. 20

Question 18: How can you reset a forgotten CMOS password?

A. Use the Password utility in the control panel.B. Reinstall the operating system.

C. Clear the password by using the CMOS reset jumper on the motherboard.D. Bypass bootup and reset CMOS to default.


57/63



4

Question 19: Which type of memory chip is used by RIMM modules?

A. RDRAMB. SDRAMC. EDO-RAMD. DDR-SDRAM

Question 20: After you assemble a new PC and load the operating system, you noticethat the hard drive activity LED is not lit up. What is the most likely cause of thisproblem?

A. hard drive has failedB. hard drive LED plug not connected properlyC. hard drive was not installed properlyD. keylock switch is enabled, causing the PC to be locked

Question 21: What does the black wire on the floppy drive power connector provide?

A. +5v DCB. -5v DCC. groundD. +12v DCE. -12v DC

Question 22: How much voltage does the yellow wire of a PC power supply provide tothe PC components?

A. -5v DCB. +5v DC

C. -12v DCD. +12v DCE. +3.3v DCF. ground

Question 23: If you want the PC to look for a bootable floppy first, which boot sequencemust be selected in CMOS?

A. A, C, CD-ROMB. C, A, CD-ROMC. C, CD-ROM, AD. CD-ROM, C, A

Question 24: What is the minimum recommended wattage for a PC power supply?

A. 150 wattsB. 200 wattsC. 250 wattsD. 300 watts


58/63



5

Question 25: Which of the following statements is true?

A. The CMOS setup utility is always started by pressing the Delete key.B. The CMOS setup utility is automatically started each time the computer is

powered on.C. The key or key combination to enter the CMOS setup utility can vary from one

BIOS manufacturer to another.D. The CMOS utility may be entered with the operating system already booted up.


59/63


Computer Maintenance I: PC Disassembly and Reassembly Exam Key2003 Texas Trade and Industrial Education

1

Student Name: __________________________ Date: __________

Question 1: How many SIMMs does it take to make up a bank in a Pentium classmachine?

A. 1B. 2C. 3D. 4

Question 2: Where is the twist on the floppy drive cable located?

A. after the last connectorB. before the first connectorC. between the B drive and the motherboardD. between the drive A and B connectors

Question 3: Which of the following statements regarding Dual Inline Memory Module(DIMMs) is valid?

A. The smallest capacity DIMM must be installed in the first bank.B. The largest capacity DIMM must be installed in the first bank.C. The DIMMs must be installed in pairs.D. The DIMMs may be installed on any bank on the motherboard.

Question 4: What does the POST code 3xx refer to?

A. memory errorB. keyboard error

C. hard drive errorD. system board error

Question 5: Moving the computer with the power on is most likely to damage whichcomponent?

A. power supplyB. monitorC. hard driveD. video card

Question 6: Which processor family uses a Socket A connector?

A. AMD AthlonB. Intel 486C. Intel Pentium IIID. Intel Pentium II


60/63



2

Question 7: Which term describes the group of memory slots that RAM is installed in?

A. slotB. busC. DIMMD. bank

Question 8: How many pins are on an ATX motherboard power connector?

A. 8B. 10C. 12D. 20

Question 9: How are hard drives configured to be a master or slave drive?

A. with CMOS settings

B. with BIOS settingsC. during the partitioning of the drivesD. with jumpers

Question 10: Which of the following computer components is dangerous to work withwhile wearing an anti-static wrist strap?

A. floppy driveB. motherboardC. monitorD. hard drive

Question 11: What does the colored stripe on a data cable represent?

A. terminationB. pin 1C. pin 40D. a keyed cableE. pin 34

Question 12: What is the most common SIMM size currently used in computers?

A. 168 pinB. 30 pin

C. 72 pinD. 32 pinE. 184 pins


61/63



3

Question 13: How should AT power supply P8 and P9 connectors be connected to themotherboard?

A. The P8 connector should be towards the back of the computer.B. The P9 connector should be plugged into the motherboard first.C. The black wires of P8 and P9 should be in the middle of the connector.

D. The red wires of P8 and P9 should be in the middle of the connector.

Question 14: What is the purpose of the jumpers on an IDE hard drive?

A. The jumpers set the termination of the hard drive.B. The jumpers determine the drive letter of the hard drive.C. The jumpers determine if the hard drive will be a master or slave drive.D. The jumpers set the ID of the hard drive.

Question 15: Which of the following computer problems will cause the floppy drive lightto stay on constantly?

A. The CMOS is setup incorrectly for the floppy drive.B. The floppy drive doesn't have a data cable attached to it.C. The data cable colored stripe is not connected to pin 1 on the floppy drive.D. The floppy drive is attached to the middle of the data cable.

Question 16: How many pins are on the connector of an IDE hard drive?

A. 40B. 50C. 34D. 68

Question 17: How many pins are on an AT motherboard power connector?

A. 8B. 10C. 12D. 20

Question 18: How can you reset a forgotten CMOS password?

A. Use the Password utility in the control panel.B. Reinstall the operating system.

C. Clear the password by using the CMOS reset jumper on the motherboard.D. Bypass bootup and reset CMOS to default.


62/63



4

Question 19: Which type of memory chip is used by RIMM modules?

A. RDRAMB. SDRAMC. EDO-RAMD. DDR-SDRAM

Question 20: After you assemble a new PC and load the operating system, you noticethat the hard drive activity LED is not lit up. What is the most likely cause of thisproblem?

A. hard drive has failedB. hard drive LED plug not connected properlyC. hard drive was not installed properlyD. keylock switch is enabled, causing the PC to be locked

Question 21: What does the black wire on the floppy drive power connector provide?

A. +5v DCB. -5v DCC. groundD. +12v DCE. -12v DC

Question 22: How much voltage does the yellow wire of a PC power supply provide tothe PC components?

A. -5v DCB. +5v DC

C. -12v DCD. +12v DCE. +3.3v DCF. ground

Question 23: If you want the PC to look for a bootable floppy first, which boot sequencemust be selected in CMOS?

A. A, C, CD-ROMB. C, A, CD-ROMC. C, CD-ROM, AD. CD-ROM, C, A

Question 24: What is the minimum recommended wattage for a PC power supply?

A. 150 wattsB. 200 wattsC. 250 wattsD. 300 watts


63/63


Question 25: Which of the following statements is true?

A. The CMOS setup utility is always started by pressing the Delete key.B. The CMOS setup utility is automatically started each time the computer is

powered on.C. The key or key combination to enter the CMOS setup utility can vary from

one BIOS manufacturer to another.D. The CMOS utility may be entered with the operating system already booted up.

assembly all

Documents