02-19-2014 07:15 AM
I got that problem now for the second time.
Bought the tablet in April 2012, 4 months later broken Power-Button and USB, March 2013 Bootloop at the static Lenovo logo/ Recovery Errors, so I got a mainbord replacement.
Now they refuse to repair out of waranty. Tried to escalate it, but the support does not know anything about many machines having that problem.
So I did some research on xda and google and I found, that our problem is the internal memory. The 32GB model has the Samsung KLMBG8FEJA-A001 chip, which is known for hard-brick on the Galaxy S3 and Galaxy Note- Samsung delivered an firmware update for that. I guess an unlocked bootloader would not help us at all.
I do not get how Lenovo keeps people with a Thinkpad machine suffer from these problems without any support. It's a shame!
02-20-2014 10:24 AM
Is there any document that specifies the memory used in our ThinkPad Tablets 32 GB? If so it will be a huge step for me for justifying product liability
Thanks in advance
02-20-2014 10:54 AM
I guess I finally found the problem. It is a messy eMMC by Samsung.
A list of known devices you can find on: http://wiki.cyanogenmod.org/w/EMMC_Bugs#How_do_I_check_my_device.27s_eMMC_details.3F
The discussion about Samsung's fix is here:
My 32GB TPT has the MBG8FA
To check your bricked eMMC-Model you have to boot into recovery, start ADB (maybe you have to install the adb drivers, check http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/adb_driver_20110720.zip).
Then type in adb shell
check if you are root (need an # in the response, if not type su)
next: cd /sys/class/block/mmcblk0/device
next: cat name
the response is your eMMC-Model
The problem is the eMMC, not the locked bootloader!
02-20-2014 12:06 PM - edited 02-20-2014 12:09 PM
If the eMMC is a faulty one, it can be the cause of the problem of corrupted partitions/software/recovery menu. But the locked bootloader it is not allowing us to try to fix the partitions with nvflash commands.... even if the faulty eMMC breaks everything again.
Also, there is no procedure provided by Lenovo to reload the partitions on this tablet model. I had seen this procedures on other models, but not on this tablet.
It will be interesting to document the problems with eMMC by Samsung on the wiki:
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02-26-2014 12:03 PM
In recognition of customer loyalty, Lenovo is providing extended coverage for ThinkPad Tablet customers who have experienced a hung boot condition, Unable to “mount a partition” or “failed to mount partition” error conditions that cannot be resolved through use of the reset button (please see hardware maintenance manual) or factory reset proceedure (this will wipe all data). Additional coverage outside of warranty for these symptoms is available through Lenovo service through August 31, 2014. Please contact Lenovo support in your country for assistance.
If you need additional assistance after contacting service, please contact me via PM.
I'm marking this as the official solution to this discussion and closing this discussion.