Troubleshooting Samsung Galaxy Tab Bootloop

Discussion in 'Samsung Galaxy Note/Tab' started by Astrix, Feb 13, 2013.

  1. Astrix

    Astrix Super Moderator Staff Member

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    Troubleshooting Samsung Galaxy Tab Bootloop


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    What is Bootloop?


    Bootloop is a condition when boot process is fails to enter homescreen and repeat boot process over and over again. Starting from after the power button is pressed, the display turn on to a certain logo and die again.


    Booting process in Samsung Galaxy Tab




    Here is the booting phase in Samsung Galaxy Tab


    * Boot First phase is do by bootloader, mark with Samsung Galaxy Tab Logo, in this step boot recognize the partition.
    * Boot Second phase, bootloader will call recovery to check every necessary files and in this phase also check is any application install queue, if yes it would go to install the application/Rom/Firmware/kernel, else it will go to next phase
    * Boot Third phase, bootloader will load pertition/system, you`ll see animate Samsung logo. In this phase all running files include Dalvik Virtual Machine (DVM) that will read one by one the applications that will load to Operating System and save the result in partition/data.


    The Cause of Bootloop


    Bootloop troubles can classified by the cause, there are:


    Bootloop trouble because recovery


    Galaxy tab will booting but stuck at Samsung logo, then the screen goes black and you can see that backlight. Next the screen will completely turn off and galaxy tab start to boot again.
    The trouble came from incompatibles recovery or corrupted recovery file.


    Bootloop trouble because file/system corrupted


    Galaxy tab will boot until the third phase, Samsung animate logo, and screen goes black then the device will reboot. Fortunately, in this case the recovery mode still can be access.
    The trouble came from a corrupt petitions / system / data


    Bootloop trouble because the animated files is not compatible


    It`s almost similar traits with Bootloop troubles because recovery, but the different, in this case recovery mode still can be access.
    The troubles came from bootanimation.zip that are not compatible with device


    Bootloop trouble because new incompatibles applications


    It` similar traits with Bootloop trouble because file/system corrupted but the difference it`s not reboot after the animated logo appear. For turn it off you need press and hold the power button for 15 sec then the galaxy tab will shut down.
    The troubles came from installed application that cannot read /load by DVM


    Fix Bootloop troubles


    Bootloop isn`t the end of the world, I mean it can be fix. Every Bootloop problem have their own treatments. Except Bootloop that cause by recovery, at other troubles bootloader menu still can be access. In other words, we can fix Bootloop using recovery.


    Fix Bootloop trouble because recovery


    1. Go to download menu.
    2. Using ODIN install stock recovery to Galaxy Tab




    Fix Bootloop trouble because file/system corrupted


    * Go to recovery mode.
    * Using ClockWorkMod do cache wipe/data wipe and Dalvik cache wipe.
    * Using Stock Recovery, do factory reset (warning!! This action will delete all data in SDcard)




    Fix Bootloop trouble because the animated files is not compatible


    Method I : Install the correct bootanimation.zip from recovery
    Method II : install custom ROM through recovery
    Method III : Install Stock Rom through ODIN


    Fix Bootloop trouble because new incompatibles applications


    Method I: Install custom ROM through recovery, then do reset factory
    Method II: Install stock ROM through ODIN then do reset factory


    Make a backup file


    Factory reset will delete all data you have, including installed application, personal data and phone setting.


    Make backup file will save your time to reinstall applications or reconfiguration the phone.


    Backup file can make using ODIN or Recovery. If your Galaxy Tab is already using ClockWorkMod, so you can use ADB features that included in KIES installation.


    Source: GalaxyTabForum
     

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