typically one red light can indicate overheating which is due to a build up of dust and other grot on the heatsinks, (cooling bits of the cpu&gpu), this can result in the three lights indicating that your cpu&gpu are coming away from the mother board! Basicly it needs to be cleaned inside. Not for the faint hearted,
I am able to repair both faults, single light £10.00, or 3 lights, (much more complex if done profisionally!), £45.00. If I cant fix it then NO fee. If you need more help, homesolutions@uwclub.net
Nick Osborne, December 2008