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Sony Xperia XZ released at Oct, 2016. Repair guides for the Android smartphone.

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failed to fix it, anyone has an idea of what could be the problem?

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hi there

2 months ago my sony xz stopped working. It had a low charge and went suddenly to blackscreen. When i tried to charge, the red light would turn on, but de device didnt really charge, i couldn´t start it. After a while also the red light wouldnt turn on.

my first thought was that the battery got in deep sleep mode. so i ordered a new battery.

When changing the battery i tested both of them for voltage. Strangely the old one had 4.19, the new had 3.85.

with the new battery inside there was no change of the situation, no charging, no red light.

i thought it might be a problem between charging port and battery plug on motherboard. so having screen and battery removed, i tried to plug in and see if there is any voltage on the battery plug of the motherboard. Since its so small and i dont know where to put plus and minus from my voltage meter, i tried to look for voltage using NCV mode (non-contact-voltage-mode) and it shows me a signal when i hold the meter over the plug.

So i assume that it is working.

so what could be the problem? Could it be that both batterys are in deep sleep mode?

or is it more likely the motherboard itself? or is my way of checking voltage via NCV a bad method?

Im extremely thankfull for any idea!

Answer this question I have this problem too

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Most Helpful Answer

Dear Asim,

I had read you facing problem regarding to your phone.

The problem actully not related to battery.

the problem is related to firmware.

it can be fixed by re flash the firmware.

All the best

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Dear jamsheer

Thank you for your input

At the moment i cant start or charge my phone.

is it still possible to re flash firmware?


Definitely, you can. nothing to worry

You can connect the phone to your computer via data cable. check any message showing on the computer.

After connecting just press and hold volume down button.

let me know your feed back for any further help


Dear jamsheer kp

My computer cant detect my phone with usb.

The phone is completely bricked:

-no lcd or led reaction for power button,

-no lcd or led reaction for charger,

-no lcd or led reaction if phone is connected to PC,

-The PC can't detect my phone with vol-,

-phone does not vibrate when holding vol+ and power together.

Im very thankfull for your help!

Best regards.


my next steps:

i try to charge for 48 hrs, and see if i get any led signal.

if that fails, i think i need to use the testpoints on the motherboard and try to re flash firmware.

allways happy to get any input. thank you!


All the best my friend


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Asim Bhardwaj will be eternally grateful.
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