Chosen Solution
I just disassembled and assembled a Sony Xperia T2 Ultra D5316 after I dropped it and broke the digitizer. I let it charge for an hour after the repair, and when I turned it on, the screen’s backlight lit up but no colors are showing. The phone has been laying disassembled for around 6-7 months. I tried putting another screen in it before this but got the same result. When I use the unlock gesture to enter my password, I get feedback from the vibration motor, telling me that the digitizer is working and I am able to interact with the phone without any color from the display. If everything was working I would be seeing the numbers and hearing the accompanying vibration when I tap them. But I can’t see the numbers or anything for that matter. So I need some suggestions on what I should try to do in order to troubleshoot or if I should describe my problem in an easier way.
I think you have installed some unwanted software in your Phone so you have to rest your phone otherwise go to the Services center.
