Arsing PC build

[Pickers]

ARGH - Problem below fixed, but New problem involving random crashes. - unsolved

I've put all the pieces of kit together and turned it on.
Fans start, lights on motherboard light up, but nothing on the screen, and the keyboard lights dont come on (caps or scroll).
I figured the case may be shorting the mobo somehow so I pulled it out and led it on a static proof bag - same thing.
Disconnected everything (except the cpu - cos that scares me with thermal gunk) and still nothing, tried each memory stick individually, still nothing.
I've tried a CMOS wipe too with no result.

Anyone got any other ideas?  I have no way of testing CPU or memory in another system...curses.

- Solved