Fix Bootlooped Coby 7033 Tablets

Discussion in 'Coby Generation 3 Development' started by vampirefo., Dec 28, 2013.

  1. Cons7an71ne

    Cons7an71ne Junior Member

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    Coby Kyros MID7035
    Hello vampirefo. First, excuse my basic English.
    The question is I have a tablet Coby Kyros MID7035 (Android ICS 4.0.3, Kernel 3.0.8), which I had rooted. But, I needed to install CWM recovery, and then use your file "7033_fix". Now my tablet is always in "Android system recovery utility", and although I use "reboot system now", boot always returns to the same place ("Android system recovery utility"). ¿Is this the famous "brick"?


    $DSC02517.JPG $DSC02518.JPG


    Anyway, I need your help to solve this problem, please, if you do not mind. Thanks friend. Regards from Argentina.


    Edit: maybe this will help?: MID7035-4-dump

     

    Attached Files:

    Last edited: Jul 26, 2014
  2. SeniorM

    SeniorM Member

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    THANKS A LOT VAMPIREFO. :)
    after test and test i can fix my bootlooped tablet, its a MID7033.

    I use the utscript_32MB and works so f*cking well, i so happy now!

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

    My only issue now is the storage problem :/ i cant watch this from Settings.
    Anyway i solved that before creating a folder called "external_sd" on the SDcard and editing the vold.fstab.
     
  3. pp_eagle

    pp_eagle Senior Member

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    Coby Kyros MID7033-4 (bootlooped, but almost fixed)
    Hello again, vampirefo, and hello everybody, :)

    I've spent some more time trying to fix my bootlooped MID7033-4. I've tried again with the two versions of utscript that have worked for other users, but again none of them works for me. As vampirefo pointed before, my unit is most probably the third version of 7033.

    I keep an incomplete stock ROM dump of my device. Looking at some of the valid files, I guess that my kernel size is 98MB, and these would be the 11 memory partitions in my device:
    0x000000000000-0x000000a00000 : "SysInfo"
    0x000000a00000-0x000001400000 : "Uboot"
    0x000001400000-0x000001600000 : "Resimg"
    0x000001600000-0x000002C00000 : "Security"
    0x000002C00000-0x000008E00000 : "kernel"
    0x000008E00000-0x00000AA00000 : "RKer"
    0x00000AA00000-0x000022A00000 : "System"
    0x000022A00000-0x00008AA00000 : "Data"
    0x00008AA00000-0x0000AAA00000 : "Cache"
    0x0000AAA00000-0x0000FFC00000 : "user"
    0x0000FFC00000-0x000100000000 : "bbt"​

    Unfortunately, the file dmesg.txt in my ROM dump, is not valid. :(

    @vampirefo:
    I don't know whether or not the previous information would be enough for you to create a new utscript_98MB, for this third version of 7033. If so, I will be very thankful to you. (I know you asked for dmesg, to calculate the entry points, but the dmesg file in my ROM dump is not valid).

    What else could I do? Is there any other way to calculate the entry points without the dmesg file? Any idea?

    Thank you very much to all of you, and very specially to vampirefo.
     
  4. vampirefo.

    vampirefo. Senior Member Developer

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    I no longer own or work on this device, My hard drive containing my Coby files died.

    I have since built another computer and haven't bothered trying to recover files from the bad drive.

    Anyway good luck to you.

    sent from my kingSing T1 via taptalk
     
  5. waldone

    waldone Junior Member

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    Hi everyone.
    I was just reading and reading several times the whole post but I really cant get to the solution.....sorry guys.
    My tablet: Coby Kyros 7035
    This is the situation:
    My tablet hangs on the f$%&ing COBY screen every time. No chance to boot up.
    After reading the post by vampirefo and other masters of the universe i could access to the recovery, try to make a factory recovery but nothing inside the folders.
    Next, I copy all the fix i downloaded from here but when I try to apply them i guet the message e:signature verification failed. try with different SD cards but still happening....

    Does anyone any idea whats happening....i´m becoming crazy!!!!!!!!
     
    Last edited: Apr 16, 2015
  6. kevinthefixer

    kevinthefixer Member Developer

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    Coby Kyros MID-9742-8
    A little more info please. Allright, a LOT more. When and how did this start? Is the tablet stock, does it have a custom recovery, custom ROM? Exactly what do you mean by "try to make a factory recovery but nothing inside the folders"? I'm afraid I don't understand. And what fix did you download from here? And do you have a build date for the tab?
     
  7. waldone

    waldone Junior Member

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    Sorry for my english....this start after I apply a custom ROM. I guess it has a stock recovery. And I dont have backup.The sympton, after I turn on the tab, the coby logo stays forever.....
    I try the coby_7035_system_dump file with the SD card and then i get the error E: signature verification failed.
     
  8. Traveller

    Traveller Super Moderator Staff Member

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    Of course you'd get a "signature verification failed" error. The dumps cannot be restored using the recovery, but must be restored using a PC and ADB (Android Debug Bridge). There are complete instructions on these forums on how to restore a tablet using a system dump.
     
  9. kevinthefixer

    kevinthefixer Member Developer

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    What custom ROM did you install? Was it one of @Vampirefo's ports, or was it a Livesuit image? Either way, if you have only a stock recovery you will probably need a new tablet. If the recovery has a hat logo when it starts up it is ClockworkMod and there is hope. If you flashed a Livesuit image you may be able to flash it again, or you may be able to find another Livesuit image, but that will be your only hope; it is actually dangerous to attempt any other fix after a Livesuit flash, which is one of the reasons we don't support it here.

    Traveller1701 makes a good point: you should be doing a lot of reading.
     
  10. vampirefo.

    vampirefo. Senior Member Developer

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    I haven't done any work, or ported any roms for 7035, I have done some work on 7033, these tablets are completely different tablets.
    Recoveries are similar, but that's about it, How did you install a custom rom through stock recovery? What rom?
     
  11. waldone

    waldone Junior Member

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    Hi guys! i can´t appreciate the thanks you´re giving! I read a lot on this forum, and this is why i decide to write here. is the only forum with real good answer and tech support! you´re awesome.
    But, how can i restore using PC and ADB, i can´t setup the tab into debugger mode.
     
  12. kevinthefixer

    kevinthefixer Member Developer

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    None of us can help you without the answers to the above questions.
     
  13. juanjo2016

    juanjo2016 Junior Member

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    I have a MID7035 and can recover files instructive. Now I want to put those corresponding to mine.
    I got 7035 files:

    boot.img
    bootloader.img
    recovery.img
    coby_7035_system.tgz

    and add utscript (instructional).

    but it remains hung on the first screen (menu Vampirefo).
    Ask: If steps

    flash_image kernel /sdcard/unsecure_boot.img

    I change

    flash_image kernel /sdcard/boot.img

    and

    flash_image RKer /sdcard/dual_recovery.img

    by

    flash_image RKER /sdcard/recovery.img

    A little help and leave as new.
    Thank you.
     
  14. TavoT

    TavoT Junior Member

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    Just registered to thanks to everyone on this thread. I bricked a 7035 while trying to install gapps and play store on it. It bootlooped and i was unable to boot it again. Following this procedure, and with the 7035 Folken's dump its alive again.

    Flashing boot.img gave me the same error

    mtd: not writing bad block at 0x04500000 (ret 1 errno 2)
    mtd: not writing bad block at 0x04600000 (ret 1 errno 2)
    "error writing kernelfailed with error: -1"

    But i ran the other commands anyway and worked just fine, after formatting and installing system, i rebooted it and it came alive right away. Now i will try to make play store work again, but knowing that it can be revived if bootloops again
     
  15. pp_eagle

    pp_eagle Senior Member

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    Coby Kyros MID7033-4 (bootlooped, but almost fixed)
    Hi, everybody,

    I could finally boot (recovery mode) my bootlooped Coby Kyros MID7033-4 (kernel 98MB), with ADB support.
    Now, I am able to launch standard recovery and CWM recovery, with ADB support.

    Next step would be to flash boot, recovery and system partitions. However, I don't have any backup, nor stock ROM dump, for my model of tablet. :-(

    Please, if any of you have this same tablet model, I would be very thankful if you could post you ROM dump (at least, boot, recovery and system partitions).

    Here I include a link to the files I used to boot the tablet from sdcard (utscript for 98MB kernel, and boot.img):
    Dropbox - coby kyros mid7033-4

    Thank you.
     

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