Posted 17 January 2008 - 12:08 PM
rigacci is absolutely right about heat and cleaning out you case, but pay particular attention to the CPU heat sink and fan assembly as this is the critical area. You should also check out the areas where air is drawn into the case. Even if this isn't causing your problem it is something that you should do occasionally, the frequency will depend on the dust level around the computer. Before you touch anything inside of the case touch the metal of the case to discharge any static build up as this can damage board components.
If you leave the computer off for five or ten minutes and try to restart it does it work, or do you still have to unplug it from the receptacle and plug it back in to make it work. If it is the latter then you could have a bad power supply. If you have a spare PSU you could try switching it and see if the problem persists.
There is a way to test the PSU with a Voltmeter, but you need some basic tech skills to do this, if you are up for trying it let me know and I'll tell you how to bypass the motherboard and test the PSU.
Family and loved ones will always be a priority in my daily life. You never know when one will leave you.