account arrowhead-down arrowhead-up mobile-menu search sm-bold-x x-skinny-rounded x-skinny arrowhead-right social-facebook social-googleplus social-instagram social-linkedin social-pinterest social-qzone social-renren social-tencent social-twitter social-vkontakt social-weibo social-youku social-youtube

Please help us improve our website

Take our customer survey to evaluate your visit.

It should only take a few minutes to answer five quick questions. Just click the Launch survey button at the end of your visit to begin.

Showing results for 
Search instead for 
Did you mean: 
Tips & Tricks

If you want to get the max out of your Xperia phone then check out Xperia tips page.

Dead Z5 compact except for detection as QHSUSB_BULK

One time poster
Message 1 of 1
Message 1 of 1

Dead Z5 compact except for detection as QHSUSB_BULK

My 2 year old Z5 compact (E5823) died while updating some app, and doesn’t show any signs of life since then. Connecting the charger doesn’t turn on LED indicator, but it does consume about 0.90A (tested with a USB meter). With battery disconnected, it consumes about 0.08A as well. It had latest official Sony updates (Nougat) and was never rooted.

I have tried all different reset procedures, and only the first time I tried the 2-minute reset did it vibrate once or twice. Since then it doesn’t ever vibrate either. If I don’t press the power button before connecting to Linux, then it gets detected as QHSUSB__BULK (Manufacturer: Qualcomm CDMA Technologies MSM) only. However, if I reconnect it , then it gives a USB error related to "USB power limit exceeded” :

device descriptor read/64, error -110

I then need to either disconnect the batter or press the off button next to Sim. My first priority is to recover its data (the phone was encrypted). And if possible, fix it. The phone wasn’t available in my country and I had bought it from abroad, thus local Sony care or a third party repair centre isn’t an option. 

I will be buying any parts and repairing myself as I have experience with electronics repair, but I need some help as I can’t even find schematics for the phone or information about JTAG connectivity for it. How can I confirm the issue is a hard brick and not something related to hardware, like power module/IC? Any other advice to further diagnose or fix it will be greatly appreciated. And if someone can send me its full service manual or schematics (Not the shorter mechanical / electrical troubleshooting guide) then that would be even better. 

Thank you very much.