Okay, tell us what diagnostic steps you've taken so far John. Have you
connected the ATX12v and full 24 pin motherboard power connector?
Incidentally, what power supply are you using? The Matrix case doesn't
appear to be supplied with one so which is it?
Have you built it up in a minimal configuration (one stick of RAM, no
drives) outside the case? If you have, did it get any further into the POST
process?
Give us a bit more to work with and we'll be better placed to help

--
Richard Hopkins
Cardiff, Wales, United Kingdom
(replace nospam with pipex in reply address)
The UK's leading technology reseller
www.dabs.com