IF the laptop works, I would leave it alone. If the system won't power on, then you'll have to remove the board anyway, unless you want to replace the power supply first, to see if that's the problem. I tried replacing a laptop board once, and never again; the connectors are tiny and proper grounding is a problem when reinstalling the board. These boards aren't upgradable for the cpu; even if you were able to use a faster cpu, you'd have to find a better heatsink with the proper connection to the board.