Last week my son's pc started having trouble powering up. It was a hit/miss thing where sometimes it would power up when you pushed the button, sometimes it wouldn't. Well it finally stopped powering up a couple of days ago. (no fans, no lights, no beeps, nothing) I suspected the power supply, so I switched it out with the one from my pc (exact same model) yet nothing happened. The power supply from his pc did power up my pc, so its not the power supply. Then I suspected the switch, so I switched out switches and even jumped the switch, nothing happened. Ok, with the power supply and switch eliminated, I did the following: 1. Disconnected everything from motherboard and tried start-up with only the power going to the motherboard. Nothing happened, cpu fan doesn't even turn nor do any lights on motherboard come on. 2. Put memory card back in and tried startup, nothing happened. 3. Tested all other components from son's pc (hard drive, floppy, optical drive, etc) on my pc and they work. After all this, the only thing I can think about is motherboard fried. I even tried resetting it by pulliing battery, nothing happens. Anybody with REAL KNOWLEDGE (no offense to anyone) have any suggestions on what else to check before I replace motherboard?