I did not pull the cpu - I just removed the stock cpu cooler and replaced it with the Vendetta. I had to remove the video card and one memory card to get some needed room, but replaced the video card and the memory card. I've even tried a space memory card but no luck. My video card has two DVI connections at the back and have tried both - no dice either. The fact the the disk access light is on steady does that mean something ?
The new cpu cooler has its own cpu fan plug. The cpu cooler fan works .
Some motherboard bios' get uppity if they don't detect a fan on the cpu fan header after they've been used to seeing one. If you haven't already found the problem, try plugging a different fan into that header (obviously, leave the real cpu fan connected).