use Fn+F0 F11 or F12 to change the speed.

up

I guess Turion TL-52 would be fine.
Choose any socket S1 compatible processor but be careful not to choose a much higher TDP.

The inverter 's dead. Get another one, it's a common issue with this laptop. To replace the part, unscrew two screws at the bottom of the screen. Two wires to unplug, and you're done!