My lock screen is not turning off, it ignores the 15 second time out and even if I press the power button it still lits up. The flashlight is flickering too. And it often heats up. There's also a notification that keeps popping up saying USB connector connected/disconnected. The lock screen will only turn off when I plug in my charger and I thought it'll be fixed once I reset my phone but it's no use.
I think it's got something to do with the CPU. Is it possible to get the CPU fixed? How much will it cost?