frontal camera issue

[ganix]

Hello to everybody.
I'm having an odd issue with the frontal camera. I searched in the forum but i didn't find any thread with the same problem.
The frontal camera doesn't work. When I choose it to make a photo the screen shows some coloured lines. Not fixed. And sometimes the screen is black.
It didn't work for a while, and I thought It was the camera itself, but when I upgraded to android 5.0.2 it began to work again.
Now it's wrong again.
Any thoughts?
Thanx

[Qatrium]

Did you try to clear camer's cache?

- Go to Settings -> Apps -> All -> Camera -> Clear cache and restart your phone.

[ganix]

Yes, thank you. I did it. And dissable and enable the cameras too. It didn' work.

[Qatrium]

Can you check if the issue is still there on Safe mode?

/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

[ganix]

Checked, It didn't work.

thank you.

[Qatrium]

Last thing you should do is trying a Phone Repair via PC Companion, this will do a clean installation of the latest firmware and will also wipe your internal memory. Don't forget to back up your data before you proceed.

Open PC companion -> Support zone -> Phone/tablet software update -> Repair my phone/tablet (blue link style). Follow the steps given, do not connect your phone until prompted to press volume down while plugging USB cable.
http://www.sonymobile.com/gb/tools/pc-companion/

If it didn't work after repair, you'll need to contact Sony support and get yor phone examined for hardware:

http://support.sonymobile.com/global-en/contactUs/

[ganix]

Ok. I said it was a weird issue. The phone has just fallen from the table to the floor. Nothing broken. But the frontal camera has begun to work again.

Thanks to all the answers. It seem to be a hardware problem.

Best regards.