|It's definitely not the switch. The PC wouldn't have powered up at all if it was bad. Besides, it's just a momentary switch like a doorbell button; extremely simply & rarely ever goes bad.|
You're going to have to do some troubleshooting
- when's the last time you blew the dust out of the inside of the case, heatsinks, & power supply?
- the power supply could be failing - putting out enough power to spin a few fans but not enough to power up an entire system
- could be the CPU has failed
- could be the motherboard has failed - check capacitors for swelling or leakage
message edited by riider