I have an eMachines desktop I've had for three or four years. I've heard about what crap these machines are, but mine has done right well until very recently. Starting a few days ago, the machine shuts itself down suddenly and with no warning. When it does this, the power is still on, but the screen is dead and it won't respond to the keyboard or mouse. The power light, instead of being on solidly, is blinking. I have to cycle power to get the machine to come back on. This can happen in as little as 20 minutes after turning the power on, or the machine can run all night without issue. I can start it from a cold start (when it's been off for a day or two) and it might crash in 20 minutes. Or it could have been running all night and I'll use it for a few hours before it crashes. So I don't think it's a heat-related problem. A call to eMachines was useless. When they heard how old this thing is, they just snorted. Any ideas where to start? Thanks!