Hi, I built a computer for my family about 4 years ago. Yesterday I opened it up to clean out all the dust, put it back together, was working fine in the evening, and then this morning wouldn't start. Every time I press the power button the motherboard lights and CPU fan turn on for a second, then turn off immediately (this actually happens twice each time I press the power button: once on/off when I push the button in, and once on/off when the button is released. If I hold the button down nothing happens).
I've already read several threads about similar problems. I've tried unplugging and replugging all of the power supply cables, CPU fan, RAM, graphics card, hard drives, and disc drive, with no luck. In most of the other threads it seems the PSU is most likely the problem--but I wanted to double check here to see if anyone else had any ideas. I don't have any spare PSUs or friends with spares, so I might try to take it to a repair shop to test it, or just buy one from Best Buy that I can return if it doesn't fix the problem.
I've already read several threads about similar problems. I've tried unplugging and replugging all of the power supply cables, CPU fan, RAM, graphics card, hard drives, and disc drive, with no luck. In most of the other threads it seems the PSU is most likely the problem--but I wanted to double check here to see if anyone else had any ideas. I don't have any spare PSUs or friends with spares, so I might try to take it to a repair shop to test it, or just buy one from Best Buy that I can return if it doesn't fix the problem.