Happy holidays and seasons greetings.

I'm away for Xmas, but looks like the problem came back again
The PC powers up but won't post, only black screen and no beep(s).
This is exactly what I don't want to happen...
Good thing I still have 10 days to sort things out when I get back, but don't know what's wrong might have to return all. The case should not be the problem as I have used it with few other motherboards back in the uk.