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Screen auto-rotation function have problem on my phone. After several restarts and on/off the function it starts working finally but not for long. After changing the application or turning off the screen again stops working. I did Factory reset, repairing...no use.
Any suggestion?
Solved! Go to Solution.
I see now that you did mention that, my bad. 
In that case the next step is to have your phone examined at one of our authorised service centers. Contact your Local support for more information on where to find one and how to proceed from here.
Hi @Vilidi,
I'm sorry to hear that.
Next time this happens could you test your phone's gyroscope in Diagnostics to see if that stops working as well? You can access Diagnostics through Settings > About phone > Diagnostics. Here you can choose Test and you should be able to find Gryoscope in the list of tests.
The gyroscope in Diagnostics does not work as well
https://www.dropbox.com/s/9mn7hwqtq7mxmas/2015-11-07%2009.00.52.png?dl=0
I have issue with Adaptive brightness too - here to share or in a separate post?
I also have this problem, tho on a Z5. Both the gyrosope and accelerometer have failed the diagnostic tests, safe mode doesn't work either. I cannot get it going again. The phone has been fine for the month I have had it and stopped working yesterday for no obvious reason. What next please?
I'm sorry to hear that.
I suggest that you try a software repair with the help of PC Companion as the next step.
In PC Companion you press start on "Support Zone" > Start on "Update the phone/tablet software" > "Repair phone/tablet" (the blue clickable link in the message) > Follow these steps without having your device connected to the PC.
Follow the instruction that appears in the program and do not connect your device until this guide tells you how to connect it.
The software repair will remove all data stored in the phone so don't forget to make a backup in PC Companion before you try the software repair. You can do a backup using the Backup & Restore option in PC Companion.
Christofer, as I said, I already did rapair ans reset also
I see now that you did mention that, my bad. 
In that case the next step is to have your phone examined at one of our authorised service centers. Contact your Local support for more information on where to find one and how to proceed from here.
Thanks for the very prompt reply @Christofer. I won't have access to a windows machine until the weekend to try the repair phone via PC Companion, so will see what happens there. If that doesn't do it, sounds like I will also need to go to the local support.
I tried registering my phone yesterday at account.sonymobile.com but couldn't as it rejected the valid imei with "Invalid format for IMEI number". Any idea round this one please?!
@getmeben If you currently have access to a Mac you can do the same procedure with Bridge for Mac. Just click "Xperia" in the top menu bar when you have Bridge for Mac running and choose Repair Xperia device from the drop down menu.
Regarding the IMEI it sounds like it could be something temporary, have you tried again today? Otherwise, send me a PM with your IMEI and I'll have a look at it. 
Mine has just been sent back today, with this issue.
Hopefully the turn around will be a speedy one.