Tempuratures are around 60*c under load, 45*c normal (I put new thermal compound on), this laptop has three problems:
-It switches off randomly occasionally, games alt+tab to desktop then power goes - not battery drainage.
-The fan sometimes makes a really loud grating noise and it has to be switched off+on to stop it
-The fan randomly speeds up very quickly for ~5 seconds, causing FPS to drop to about 1 (not helping midtown madness )
-I often get graphics problems, e.g everything goes red and pink then goes back, or white dots. Sometimes the display will go very fuzzy and will have a scroll effect (like when you film a screen and there's bars going down it) and it will not respond to any key presses, then turns off.
Specs:
192mb onboard RAM
SiS M650 Onboard Graphics (64mb)
2.0ghz Celeron - 512kb Cache
What actions should I take with this? Thanks.

oh yeah, would http://cgi.ebay.co.uk/Mobile-Intel-C...3A1|240%3A1318 this CPU fit it? Mobile 478 takes (almost) all Pentium 4/Celeron Processors, doesn't it?