Strange boot up problem.

[Parsley]

My old computer has done this to me a couple of times now.

When turning it on, it boots up and then powers down again before posting, then boots up and carries on as it normally would.

Why would a pc do this?

 

[Parsley]

I just thought it odd that it had never done this before and suddenly it started doing it. It's an nforce2 chipset if I remember correctly. It's getting on a bit now .

My current desktop does it but I have 2 mates with the same board (overclocked cpus also) and they do the same thing, I just assumed it was normal.