mobile

Dear XDA,
My phone served me well for the last two years, but a few days ago it started acting strange. The screen is the problem. So the first time it happened i was playing a game, and suddenly the screen froze and the colors started changing, lines started appearing, and then kept inverting colors, all in a matter of 4-5 seconds, and then it went back to normal. After a few more times this happened I came to a conclusion. It had nothing to do with the GPU because if i shake, hit, or make sudden movements on the phone then it comes back to normal. After a few days i had to gently tap it against a wall to return everything to normal. During the whole messed up screen thing the touch still works. I can still unlock and make calls and everything if i remember where to tap correctly, but the screen visually messes up. Now the bigger problem is that those taps have to be stronger, at one point the touch didnt work but the screen showed regular colors and animations, and then went back to normal with occasional visual problems again. In the end i planned to use it as an mp3 because the screen is fully black. The screen is black but lit up, so when i touch it it gets dimmer, touch with one more finger gets even more dim, and when i release then it lights up again, black. I couldn't find help anywh ere else on xda or google, so i need your help. Is there anything i can do from my end? Is it some dying resistors which i can solder, or if it is the screen cable, or what is it? What can i do to get the most out of it? (flashlight, mp3, or is it absolutely useless)? Some information on what it is would be useful.
The phone is a 5'2 inch Alps Tudou91 D1 1gb ram cortex-A7 1.2ghz

PS: I will add the pictures and a video to this comment once i copy it from my friends phone

Thank you.