ATI drivers

[MBuck82]

So I went to install updated graphics drivers, and a friend told me I had to delete my old ones first (2 ATI 3870s running crossfire on vista 64bit), so I delete them and my display now doesnt work. I removed my HDMI cable and put back a DVI but still doesnt work, get the message to check connections but the connections are good. How would I go about fixing this?

 

[B-Unit]

^+1, do you see the BIOS post screen and the little blue bar as Vista loads or no picture ever?