So awhile back I broke my screen, I sent it to replace it and waited for it to be fixed, once it got fixed I had a look on...

I’ve had a friend that had that issue awhile back. He had a screen protector on and I think he didnt apply it correctly and small particles of dust were on the screen. Then time passed and the screen started having purple and pink on the bottom left corners, day by day it started to spread around all of the display and eventually he replaced the screen. If you have a screen protector remove it asap or you will end up breaking your phone.

Hi, those are called Thermal Pads, they transfer heat from your memory chips. Hope this helps!

It could be a faulty motherboard or the charging chip, I dont really know much about these but just sharing my opinion.

Hey Carlo, did you check if there was something blocking the fan? Any cables or screws?