nexus loop back issue explained

2
1800 108 8485 ASUS Service Centre (New service center address) ------------------- F1 Infosolutions & Services Pvt Ltd Saleh Center,Before Sigma Mall,Behind Executive Chamber,Bangalore-560027 (0.4km) 080-40979030/33 10am - 5pm Products: Notebook, LCD Monitors, Desktop PC, All-in-one PCs, Tablet, PadFone, Eee PC, Eee Box, ZenFone, Eee Book Compuage Infocom Ltd # 5 S M Tower,4Th Flr Otc Road,Bangalore- 560002 (1.3km) 080-65687568 Mon- Fri 10am to 5.30pm Products: Motherboard, Notebook, Tablet, PadFone, Eee PC, ZenFone, Eee Book Regenersis India Limited Regenersis (India) Private Limited, 3Rd Floor, #53/58,Sri Chakravarthi Complex,,Sajjan Rao Circle ,V.V.Puram,Bangalore 560004 (1.9km) 080-41205444/65970906 9:00 - 18:30 Mon - Sat Products: Motherboard, Notebook, Graphic Card, Tablet, PadFone, Eee PC, ZenFone, Eee Book ========================================================================= ===================== I have a problem with my nearly new Nexus 7 2013 Wifi model. First the story hat happened, maybe it has to do with it: I bought it in August and now updated it to the last version, 4.4.2 Kitkat. All was fine, i never had any problems until 2 days ago. I saw that the battery was running out but since it was night i let it be. In the morning i heard the sound for an empty battery for the last time, but i didnt check screen. After 20 minutes i looked at the screen and saw the Google-letters only. It didnt respond to the Power button beeing pressed so i thought the battery is too empty to let the device start and decided to plug it to the charger. Just now i saw that the cable was not plugged in the charger, it was plugged in the PC instead, connected to an USB port (of course). As soon as i saw it i plugged out the cable from PC-USB and put it into the charger. Im afraid this wasnt good. Not sure what happened here exactly. Now the problem Anyway, nothing happened after plugging into charger, the Google letters where there but no symbol that the battery is loaded or anything. I thought ok, maybe thats normal if battery fully dry so i let it charge for at least 3 hours. I saw a symbol now and it showed the battery 80% full. Now i tried to start the device but nothing at all happened. Still the Google letters showed up and not more. I know about the fastboot menu (power+volume down) and did that. The fastbook menu shows up and i can

Upload: ajaykd

Post on 28-Sep-2015

4 views

Category:

Documents


0 download

DESCRIPTION

Nexus tablet has issues quite often found when it hangs or does not restart. It stucks to initial screens with Google logo. This book explains the issues related to it.

TRANSCRIPT

  • 1800 108 8485

    ASUS Service Centre (New service center address)

    -------------------

    F1 Infosolutions & Services Pvt Ltd

    Saleh Center,Before Sigma Mall,Behind Executive Chamber,Bangalore-560027

    (0.4km)

    080-40979030/33

    10am - 5pm

    Products: Notebook, LCD Monitors, Desktop PC, All-in-one PCs, Tablet,

    PadFone, Eee PC, Eee Box, ZenFone, Eee Book

    Compuage Infocom Ltd

    # 5 S M Tower,4Th Flr Otc Road,Bangalore- 560002 (1.3km)

    080-65687568

    Mon- Fri 10am to 5.30pm

    Products: Motherboard, Notebook, Tablet, PadFone, Eee PC, ZenFone, Eee

    Book

    Regenersis India Limited

    Regenersis (India) Private Limited, 3Rd Floor, #53/58,Sri Chakravarthi

    Complex,,Sajjan Rao Circle ,V.V.Puram,Bangalore 560004 (1.9km)

    080-41205444/65970906

    9:00 - 18:30 Mon - Sat

    Products: Motherboard, Notebook, Graphic Card, Tablet, PadFone, Eee PC,

    ZenFone, Eee Book

    =========================================================================

    =====================

    I have a problem with my nearly new Nexus 7 2013 Wifi model.

    First the story hat happened, maybe it has to do with it:

    I bought it in August and now updated it to the last version, 4.4.2

    Kitkat.

    All was fine, i never had any problems until 2 days ago. I saw that the

    battery was running out but since it was night i let it be. In the

    morning i heard the sound for an empty battery for the last time, but i

    didnt check screen. After 20 minutes i looked at the screen and saw the

    Google-letters only. It didnt respond to the Power button beeing pressed

    so i thought the battery is too empty to let the device start and decided

    to plug it to the charger.

    Just now i saw that the cable was not plugged in the charger, it was

    plugged in the PC instead, connected to an USB port (of course). As soon

    as i saw it i plugged out the cable from PC-USB and put it into the

    charger. Im afraid this wasnt good. Not sure what happened here exactly.

    Now the problem

    Anyway, nothing happened after plugging into charger, the Google letters

    where there but no symbol that the battery is loaded or anything. I

    thought ok, maybe thats normal if battery fully dry so i let it charge

    for at least 3 hours. I saw a symbol now and it showed the battery 80%

    full. Now i tried to start the device but nothing at all happened. Still

    the Google letters showed up and not more. I know about the fastboot menu

    (power+volume down) and did that. The fastbook menu shows up and i can

  • select all kind of things like "Start", "Restart bootloader", "Recovery"

    and "Shut off". Following things happen when i press them:

    1. Start > 1 second after pressing start the Google letters show up and

    nothing happens anymore, no X, nothing

    2. Restart bootloader > bootloader restarts (works also over tools like

    Nexus 7 Root Toolkit, i can restart here too)

    3. Recovery > same as 1., the Google letters show up, not more.

    4. Shut off > Device shuts off

    Now im also developing for Android and that means i have SDK and drivers

    and all that iinstalled. And it worked always, i could push an app to the

    device over ADP etc. That just as a side note.

    So now i tried to unlock the bootloader to flash my own one, with

    fastboot. When i enter "fastboot oem unlock" it is stuck right at the

    first point, wipe userdata. The device has an id so the drivers are ok i

    think. I just cannot erase the userdata. This will stay like this until i

    power of the device. Then it continues and says "failed".

    The real question

    Now without to be able to continue past this im not able to flash

    anything, if im correct yes.? So do you think this is a hardbrick? Are

    there other options?

    Thanks for any help and tipps, im really out of options.

    Btw, exactly same behaviour i have with tools like Nexus Root Toolkit or

    any, fastbook cannot erase user-data on bootloader and stuck