Dead Screen, Phone is working and PC identifies it. Rings only Vibrate

Hi

i was playing PUBG on my phone and i closed the app and a few secs later while i was listening to music, screen turned purple and slowly faded to black, but backlit was on even tho there was nothing on the screen.

i hard reseted the phone since power button wasn't functional. (only works when i use it with home button to go DFU mode)

and now i can only turn on phone only by hard reset and getting the phone out of DFU mode.

phone works and receives calls but only vibrates and speaker doesn't work.

i tried another screen, and tried to disconnect and connect the screen into board.

but nothing happened and im still got the issue.

also i tried all the methods on the internet and

restored the phone.

i don't know what to do anymore,and i don't have access to any apple stores.

thanks for anyone putting some time to answer.