Requesting Firmware Dumps from Coby Generation 3 Devices

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steev

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Sep 3, 2011
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Disclaimer: Due to users continuously bricking their tablets by attempting to use the Livesuite ROM images in this post, the links to those images have been removed. System dumps are unaffected.

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I am requesting firmware dumps from Coby Generation 3 (MIDxx42) devices using the Allwinner A10 SoC.
With these I should be able to create firmware restore images to be used for unbricking.

Firmware dump instructions here:
http://www.androidtablets.net/forum...mps-coby-generation-3-devices.html#post205970

Then upload the *.img files and system.tgz you pulled

Thanks

Coby doesn't provide firmware downloads for these tablets, which is why I'm trying to put these together.

UPDATE:

WARNING:
I have tested these on my Novo 7 Elf tablet which has similar hardware and it worked, but I can't guarantee they work on the Coby tablets since I do not have the hardware to test.
Therefore, I recommend that somebody with an already bricked tablet be the first to try it.


Firmware restore images for Coby Kyros 7042:

It was discovered that Coby is using 2 different touchscreens in the 7042 models, goodix and ft5x_ts.

The firmware below should support both touchscreens:
coby_7042_4.0.3_dual_ts.zip (Thanks David for the dump), Confirmed working by David

The following firmware only supports 7042 models with Goodix touchscreens:
coby_7042_4.0.3.zip (Thanks to Joe88 for providing the dump)
md5: 3c014061580d74c4c6b112204f3deb92

Firmware restore images for Coby Kyros 9742
coby_9742_4.0.3.zip (Thanks to RedDeer for providing the dump), Confirmed working by swalker5906
md5: 71a31c954e164a0bb7f19bbd1a143d7a


Flashing instructions:
- Download LiveSuite, this is the flashing software for A10 devices
- Run LiveSuitePack.exe (a bunch of files will be extracted to the current folder, so best to create a new one)
- Now run livesuite.exe
- Choose "SelectImage"
- Choose the coby_kyros_4.0.3.img
- Now you need to put your device in upgrade mode, to do so:
1. power off the device
2. Press and hold any physical key except the power key on the device(ie, press and hold Vol+ key, still holding in 3 and 4)
3. Connect the tablet to your PC via USB cable
4. Repeatedly press the power button until a popup dialog shows on your computer screen
- Now follow the on-screen instructions

If this works I look forward to seeing some custom ROMs from the Coby community :)
 
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steev

Senior Member
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Sep 3, 2011
370
236
I read that my 7042-4 has the Cortex A8 CPU. Do you still want the firmware dump? Where can I find the process to perform said dump?
Thanks
Don

Thanks! The 7042 is one of the firmware dumps I'm looking for.

Attached is a script that will dump your firmware.

Instructions:
- Install the ADB drivers for your device. (This guide here should work)
- Root your device (see here: http://www.androidtablets.net/forum...s-coby-generation-3-devices-2.html#post206352)
- Download and unzip the attached file
- Run dump.bat
- Click "allow" if the Superuser dialog pops up on your tablet.

The firmware files will be in the "dump" folder.
 

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Last edited:

steev

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Sep 3, 2011
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Damn, I assumed it would already be rooted like the base Allwinner firmware, but I guess Coby changed it.

Your system dump might be usable though.
We will need root to dump the others.
 

steev

Senior Member
Developer
Sep 3, 2011
370
236
Thanks!

Your system dump looks good.
I will try to come up with a way to root this firmware so the other files can be dumped.
 

steev

Senior Member
Developer
Sep 3, 2011
370
236
edit: does not work
 
Last edited:

davidmatt34

Member
Nov 4, 2011
27
3
This is what I got when I ran the .bat

Waiting for device...
Pushing files...
push: data/Superuser.apk -> /sdcard/Superuser.apk
push: data/su -> /sdcard/su
2 files pushed. 0 files skipped.
3613 KB/s (865867 bytes in 0.233s)
failed to copy 'usb_modeswitch.sh' to '/system/etc//usb_modeswitch.sh': Read-onl
y file system
Unable to chmod /system/etc/usb_modeswitch.sh: Read-only file system
Finished
Press any key to continue . . .
 

steev

Senior Member
Developer
Sep 3, 2011
370
236
When you say insert a "USB device" do you meen to connect it to the tablet?
Yes.

This is what I got when I ran the .bat

Waiting for device...
Pushing files...
push: data/Superuser.apk -> /sdcard/Superuser.apk
push: data/su -> /sdcard/su
2 files pushed. 0 files skipped.
3613 KB/s (865867 bytes in 0.233s)
failed to copy 'usb_modeswitch.sh' to '/system/etc//usb_modeswitch.sh': Read-onl
y file system
Unable to chmod /system/etc/usb_modeswitch.sh: Read-only file system
Finished
Press any key to continue . . .
Thanks for trying.

That's what I feared, Coby did mount /system read-only.
Will have to try something else.
 

steev

Senior Member
Developer
Sep 3, 2011
370
236
Ok here is root attempt #2 if anybody will kindly try.
I am fairly certain it will work on the 7042, might need to be modified for the others.

If this works I take no credit, the root exploit was done by saurik.
The only thing I did was figure out the offsets for Coby's run-as bin.

Instructions:
- Install USB drivers like in earlier post
- Download and unzip attached file
- Run root.bat

If it worked you should now be rooted.

Hopefully this one works, and sorry about the previous failed attempt.
 
Last edited:

Joe88

Member
Apr 27, 2012
65
10
I got this error

58489818.jpg
 

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