Boohoo...got back yesterday morning, want to post some pics and videos, but can't get my (old) desktop pc to boot !

Power on, all LEDs are flickering...including CD, which I can't open to try a boot CD, and mouse light too.

Casing and processor fans are working. Monitor shows 'no signal'.

No beeps.

Faulty PSU ?

It had been playing up previously when trying to boot, but I just left it on all the time.

I have reseated the ram modules and taken out and reinserted the battery, plus checked all connectors.