Hello everyone, good day to you all
I'm trying to repair a HP 4520s laptop. the problem is it shuts down after a while using it (surfing the net, typing, watching movie, installing software ...). i thought this could be related to heat and i was right. i installed Speedfan and watched both CPU and GPU temperature go above 80C and shortly after that shut down. i disassemble the laptop. the fan was not working properly. actually it was working really slowly. so the obvious thing to do is replacing the fan with a new one which i did. but the same thing happened with the new fan! slow fan speed, overheating and shutting down. i checked the fan, the screws, the connection but everything is ok. a friend suggested this could be related to an IC controlling fan speed. what do you people think?