Help - pc not turning on

rp wrote:

On Tue, 8 May 2018 15:23:42 -0000 (UTC), Yes wrote:

When I press the on/off button for the pc on the front of the case,
I see it start to light up but within a fraction of a second, it
shuts down is the best way I can describe it - does not continue to
boot up. When I press the on/off button again, nothing happens.

Disconnect everything you can, apart from the motherboard. If the PSU
still doesn't keep the fans running remove any video cards and try
again.

If it's still failing it's likely to be the PSU. It's showing signs of
shutting off due to an overload and it could be the PSU that's failed.

Good luck.

RP,

I followed your advice. I have four SATA devices - a CD/DVD player and
three HDDs. I disconnected all of them. The pc booted up. After
that, I re-connected each one individually. When all was said and
done, one HD would always result in immediate shutdown. With another
HD, the pc would boot up, but BIOS would not recognize that the HD was
there. My pc would only recognize the CD/DVD player and one HD.
Fortunately (???), that was my c: drive. I'll have to research if the
data on the broken HDDs can be salvaged.

I believe the SATA connectors on the mobo work. I plugged the SATA
cable of the working HD into the various SATA connectors and confirmed
that BIOS recognized it.

John