2 things..
1 maybe that power supply is not the right one? It has to have the capacity to handle that PC.

2 maybe there is lots of dirt in the laptop? IF SO it will run hot and the fan may run all the time..not good for any of it.
I clean mine out once a year...remove the bottem cover if you can...then, with it OFF spray clean it with air (the air in cans you get for pc's)

Lee S.

[This message has been edited by leeboy (edited 12-21-2010).]