Just bricked my Tablet with MXTP...

[Weltherrscher]

Hi,

just bricked my Z4 tablet by only restarting it.
After the restart the Anti-Theft Protection kicked in and didn't accept my google password.
Google Account Authentication was correct, but the MXTP-Authentication keeps saying: username / password not correct...


Sony Support told me to send in the device to repair it at MY cost!
Nice, MXTP kills the tablet and I have to pay for it...

 

[Aripex]

just bricked my Z4 tablet by only restarting it.
After the restart the Anti-Theft Protection kicked in and didn't accept my google password.
Google Account Authentication was correct, but the MXTP-Authentication keeps saying: username / password not correct...

Try this method to see if it lets you log on?

 

[Weltherrscher]

Done this already, since that, the website doesn't recognize the tablet at all...
This behaviour seems to be caused by the fact, that, after the factory reset, the myexperia-app is not starting on boot so it can't connect to the website....
You can say, this method has deep-bricked the tablet... =(

 

[Weltherrscher]

Got it back from repair (Sony told me to send it to w-support.com).
40 € for a destructive flaw in Sony's own software.
They did some kind of obscure repair-flash, but how?

Thanks and NEVER activate this piece of crapware again...

At least they hadn't changed the motherboard unlike other stories from the M4 Aqua...

 

[sonymaa]

Hi,

just bricked my Z4 tablet by only restarting it.
After the restart the Anti-Theft Protection kicked in and didn't accept my google password.
Google Account Authentication was correct, but the MXTP-Authentication keeps saying: username / password not correct...


Sony Support told me to send in the device to repair it at MY cost!
Nice, MXTP kills the tablet and I have to pay for it...

You can fix this by flashing lollipop with flash tool. I used the one from the https://forum.xda-developers.com/z4-tablet/general/guide-safe-bootloader-unlock-restore-t3362391
Wipe everything you can when flashing. After it's done flashing you will have about 30 sec on every boot before the lock screen hits.
On the first boot set the wifi settings from the lock screen. Then reboot and start setting up the tablet. Skip everything that can be skipped. You have to continue to reboot and do it over and over and over until you get the hang of it. Once finished setting up tablet. You will have about 30 sec to go into settings from menu on every boot. From here set up experia protection again, choose a gmail and pass thats quick to type because you will not have allot of time. When protection is activated you will have access to tablet again. Deactivate.

This works. I can confirm.