topic Re: T2 Ultra only charges in fastboot mode in XPERIA archive

T2 Ultra only charges in fastboot mode

tovrstra — Sat, 11 Jul 2015 17:13:22 GMT

My Xperia T2 Ultra phone is one of the many plagued by battery charging issues. Because I bought it while traveling in the US, customer support is basically non-existent. (I fail to see the logic of that but that's apparently one of the ways Sony is screwing its customers.)

I discovered that the phone can still charge when it is in fastboot mode. This basically means that the hardware is still functioning properly but that the charging issue is due to a software bug. I've upgraded to firmware_19.3.A.0.472 but the problem is still present. does anyone have suggestions on how to fix this?

Re: T2 Ultra only charges in fastboot mode

Uliwooly — Sat, 11 Jul 2015 17:19:36 GMT

What if you reinstall the latest update with PCC?

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

Re: T2 Ultra only charges in fastboot mode

Phy — Sat, 11 Jul 2015 17:20:51 GMT

Does it charge properly while on safe mode?

How to boot on safe mode.
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

Re: T2 Ultra only charges in fastboot mode

tovrstra — Tue, 21 Jul 2015 10:57:08 GMT

That didn't fix the problem. The symptoms are exactly the same after the update with PC companion.

Re: T2 Ultra only charges in fastboot mode

tovrstra — Tue, 21 Jul 2015 10:57:30 GMT

Also in safe mode, it does not charge.

Re: T2 Ultra only charges in fastboot mode

tovrstra — Tue, 21 Jul 2015 11:15:23 GMT

So, to be more specific: I'm currently back home in Belgium with no hope for support for a device bought in the US. Does anyone have suggestions for getting the device repaired?

I also noticed that the device charges briefly before the Sony and Xperia logos appear. When in fastboot mode, it only charges up to 36%, not further, no matter how long it charges.

A final odd thing is that the device is only recognized by my computer when in fastboot or flash mode. These are the devices listed by lsusb under Linux:

* flash mode:

Bus 001 Device 009: ID 0fce:adde Sony Ericsson Mobile Communications AB C2005 (Xperia M dual) in service mode

* fastboot mode:

Bus 001 Device 014: ID 0fce:0dde Sony Ericsson Mobile Communications AB Xperia Mini Pro Bootloader

Shouldn't it also be a valid USB device when simply powered on?