Display problem

[luis_l]

I bought a Xperia M5 for about 10 days. It worked perfect for 2 or 3 days but after that I´m experiencing problems with its display. It remains black (the backlight turns on) and there´s no way to make it work. Sometimes the image apears three times on the screen, then it flashes and turns black.

I tried to flash the firmware again (it´s on the last version already) but the problem is still the same.

The only way I found to make it work, at least a few minutes, is taking out the SIM card and inserting it again.

Does anybody have the same problem? Did you find a solution?

Thank you very much

[Phy]

Check if you experience the same 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

How to boot on safe mode on Lolipop
1. press and hold the power key
2. once you get the pop up menu 
3. press and hold "power off" 
4. Boot on safe mode should become available

[Phy]

If it is a software issue you can try to repair it with Sony PC Companion.
http://support.sonymobile.com/gb/tools/pc-companion/

[luis_l]

Hello Phy,

  thank you for the answer. I entered the safe mode and the problem persists. I've flashed the ROM twice, in this case it seems to fix the problem but after a few minutes it is back.

 Right now the screen is black all the time, it is impossible to operate the phone. The only way I found to solve the problem is taking off the sim card and inserting it again. Unfortunately this solution only works for a couple of minutes until the black screen is back.

[PavelK]

Same as me. During 1 year it happen about 5 times. Every time i plug power, wait about one or few hours.
Never time was battery empty at incident time. May be will help only wait some hours.
When i send to authorization center for repair, they send back that trouble was not possible repeated. I am very unhappy. And unsatisfied with Sony authorization service.