HI Mike
Thanks for the reply

Michael Kennedy wrote:
Have you tried basic troubleshooting like removing all the drives and cards
and reseating the memory then powering it up? If that doesn't work, remove
everything except the processor and power it up. It should give you some
beep codes (memory or video) if the board and processor are working.

- Mike

Yup - tried all that.... no change to the reported symptoms.

I've just ordered a 'drop in' motherboard bundle - let's hope that fixes
it (after all - there's not much else to go wrong !)

Thanks
Adrian