Boot-Loop after OTA3

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Hi,

i think i just bricked my TPT - or at least i just don't know how to recover from the boot loop. first of all what did i do:

I've been @ 0065_WE, device was rootet, OTARootKeeper was applied.
Since i've removed lot's of lenovo-bloatware i wasn't able to follow normal upgrade path so i had to restore the APK's (thankfully they were provided here).
Then i did a wipe data/factory reset and manually applied the OTA2/2.5 Updates in the following order (downloaded from download.lenovo.com):

1. A310_02_0037_0076_WE
2. A310_02_0039_0089_WE

TPT booted, all fine - so i downloaded the OTA3, went to recovery again, applied it, all went fine, but now i am stuck in a boot-loop. On startup Lenovo logo shows up, stays for about a minute, then device reboots. After 3-5 reboots display stays black. What i am also worried about is, that probably my battery will discharge and i do not seem to be able to charge it - after i plug in the stock charger the battery icon appears but the tablet seems kind a stuck - if i remove the charger the battery icon stays... i have to reset the device using the button next to the SD card.

Since there are no full system images from lenovo the only solution i can think of would be flashing CWR and applying a nandroid backup. But as far as i read here CWR is NOT working with the ICS boot loader - so do you guys have any idea how i could get the TPT up and running again? Did i do something wrong? I thought applying stock update.zip's using stock recovery should be safe...

Hello
Try the following.
The tablet should not be plugged.

1: boot in recovery mode.
2: Delete cache partition.
3: Press and hold the reset button for 20 seconds.
4: Turn on Tablet.

Well, i followed these steps, now the TPT is not boot-looping anymore, instead it stays at the lenovo screen...

i also did a full-wipe, wiped cache, re-installed the ICS update, rebootet, re-done your 4 steps, doesn't change... my only hope would be to be able to install CWM using stock recovery and re-flash it with a nandroid backup...

but as far as i know there's no cwm for ics yet... so any other ideas?

and another side-question: is the TPT charging while in (stock) recovery?

No other idea, sorry.

Gesendet von meinem ThinkPad Tablet mit Tapatalk 2

Originally Posted by Schmischi

No other idea, sorry.

Gesendet von meinem ThinkPad Tablet mit Tapatalk 2

thanks for the try :)

i just wonder if i can get ADB to work somehow - is it available in stock recovery?
my PC recognises the tablet, but states it is an MTP device and "adb devices" does not find anything... :-/

btw: it is reproducable, if i re-apply the ICS update, the TPT is boot-looping, after the 20seconds reset-thingy it just stays at lenovo screen - what does the 20seconds-reset do?

thanks 4 help :)

A similar function as the remove the battery. I've read in a thread to fix from loop problems.
This has helped me when I had a similar problem.

Gesendet von meinem ThinkPad Tablet mit Tapatalk 2

Instead of reinstalling ics why not go back to 2.5?

going back would require a working CWR and a nandroid-backup too, cause the lenovo updates are incremental only and have the version-checks in the update script :(

the easiest solution would be a whole system image as signed update.zip, but lenovo does not provide anything like this...

i've never ever bricked any of my samsung devices, even in the most crappy situations i was able to flash back to the latest stock firmware with the images provided at samfirmware.com...

but i'm still hoping ... :)

Maybe something's missing?
Try to flash all 5 Updates available.
h**p://download.lenovo.com/slates/think/tablet1/ThinkPadTablet_A310_02_0024_0065_WE.zip
h**p://download.lenovo.com/slates/think/tablet1/ThinkPadTablet_A310_02_0037_0076_WE.zip
h**p://download.lenovo.com/slates/think/tablet1/ThinkPadTablet_A310_02_0039_0086_WE.zip
h**p://download.lenovo.com/slates/think/tablet1/ThinkPadTablet_A310_02_0039_0089_WE.zip
h**p://download.lenovo.com/slates/think/tablet1/ThinkPadTablet_A310_03_0064_0126_WE.zip

Wipe cache partition before each flashing and let it try booting between.
Last chance!

Problem is the missing ICS-Bootloader!

Grüessdi
Phiber