So I have this n5110 tablet which has performed without problems since I bought it last year in December. Device is running TWRP recovery and Resurrection Remix 5.7.4 (CM13 based).
The symptom: first time it happened was during an "apps upgrade" session. Google Play Store updated a bunch of apps and all in sudden the tablet froze. Completely. Dead. Clock in status bar stopped working. After an hour I gave it a reset (hold power until it reboots). The result: boot loop. After finishing the boot process, it showed the lock screen for couple of seconds, then reboot ... and so on.
Went into recovery, did a wipe of data & cache & dalvik & system and started all over. After restoring the system, i started installing apps. All in a sudden ... BOOM ... same problem again.
You can imagine - I went through this process about 7 times. Then I realized, no matter what I do, if free storage has decreased to about 7.6 GByte, the big boom happenes and the phone is dead (boot loop).
I began to suspect a nand problem. So after restoring the system (without reinstalling all my apps) I installed “eMMC Brickbug Check” which also does a memory check. The app showed no problem. All good.
So back to recovery, into terminal and there I tried to “zero” the data, cache and dalvik partitions using “dd if=/dev/zero bs=1M of=/dev/block/mmc...” - you get the idea. No error messages here so all 3 partitions did not cause a nand writing problem.
So I'm stuck now. Before I try to replace the motherboard ... does anyone have an idea on how to really “test” the nand to confirm my suspected nand write problem?
Thanks for any help!
Markus.
The symptom: first time it happened was during an "apps upgrade" session. Google Play Store updated a bunch of apps and all in sudden the tablet froze. Completely. Dead. Clock in status bar stopped working. After an hour I gave it a reset (hold power until it reboots). The result: boot loop. After finishing the boot process, it showed the lock screen for couple of seconds, then reboot ... and so on.
Went into recovery, did a wipe of data & cache & dalvik & system and started all over. After restoring the system, i started installing apps. All in a sudden ... BOOM ... same problem again.
You can imagine - I went through this process about 7 times. Then I realized, no matter what I do, if free storage has decreased to about 7.6 GByte, the big boom happenes and the phone is dead (boot loop).
I began to suspect a nand problem. So after restoring the system (without reinstalling all my apps) I installed “eMMC Brickbug Check” which also does a memory check. The app showed no problem. All good.
So back to recovery, into terminal and there I tried to “zero” the data, cache and dalvik partitions using “dd if=/dev/zero bs=1M of=/dev/block/mmc...” - you get the idea. No error messages here so all 3 partitions did not cause a nand writing problem.
So I'm stuck now. Before I try to replace the motherboard ... does anyone have an idea on how to really “test” the nand to confirm my suspected nand write problem?
Thanks for any help!
Markus.
