Hi guys, i just have encounted a problem with my computer, following stats:

M/b - Gigabyte - EP45UD3P
CPU - Q9650
RAM - 8gig 5-5-5-15
HDD - 300GB Velicoraptor
GFX  - 4890 ati

I have just formatted my hdd and to install windows 7, it installed no problems. But now my computer has no signal at all now. I have taken out the bios battery and also cleared the cmos but still nothing, BUT i can hear the whole computer system go into windows. No video signal. Any help ? I'm going to try another card. But anything else you can think of. And i'm thinking it may need RMA.

Cheers