Righ mark, ive been through what you posted
First off, I bought new ram (2 x 1GB) and tried that and it booted up fine for one day, next day back to the same position.
Everything connected, its does not post.
Cleared the CMOS and still does not post.
The powerlight comes on but hard drive light does not.
No sounds from speakers on startup.
Tried different kinds of ram in each slot and still nothing.
Cant try cpu in another pc as its different to this one.
Tried other psu and still does same thing.
Like i mentioned before, I unplugged everything from motherboard apart from the psu and it gives no error bleeps on startup, they usually bleep to say that ram is not present ?
tony