No power on DOS PC.. no idea why.

[Digital X]

Compaq Slot 1 Motherboard, Pentium 3 CPU, and 256MB RAM.

Green light on the Motherboard and have tried the PWR header cable and motherboard cable only. I get a green light but the power button does nothing. I have tried the PWR cable in all pins, and each way around, no dice. New PSU as well, I don't know what to do.. Any ideas?

I have been gaming for a long time so PC's are not new to me, but this has me stumped.

Tried a different ram stick, in a different socket and nothing.

I've put it away now so any advice is good while I calm down haha.

Should note: I have no HDD yet, I have a CD ROM and Windows 98. The PC should start without right..? It's been a while since I used this old stuff. If I'm doing anything silly, wrong, let me know!

PSU's I've tried are both EVGA Supernova NEX and Kolink 400w.

 

[Jediben]

Has the hamster died?

CPU unseated?

 

[Rroff]

System that old its fairly possible components have just failed with time - capacitors, etc. tend to degrade (more significantly) after around 10 years.

I still have my original P3 out of some sense of nostalgia and same thing happens on that these days - lights on but no one home. (It was working fine when last shutdown in like 2003 or something).