I have a older computer that will always be slow to post when starting from cold start. The fans start but nothing else and then about 30 seconds later I hear a ticking sound and then it boots

If shut down and restarted within a few minutes it starts fine.Once it is running it is fine.

It is a duron 1.2 on a biostar M7VKQ

I tried a different Hard drive, still the same.
I disabled the nic, same
I added a vid card, same
I tried a different power supply, same

Out of ideas here, anyone got any more

Mic