You can enter the BIOS setup program by pressing <F2> during the boot process and press <F9> to restore BIOS default settings. Make sure you are not using any kind of adapters or converters for this DVI cable.
The complete guide for no boot issues can be found at the following website:
If you're going to be removing a graphics card and using the onboard graphics in a board, be aware that the graphics card drivers and related software may need to be completely removed before shutting down and removing the card.
My 'tip' for this situation is to find a spare, blank HDD, install it (unplugging the original drive in the process) and attempt to boot and load windows onto that HDD. If you've been diligent and regularly backed up everything on your original HDD and can afford to loose everything on it (and don't mind the tedium) you could just wipe the original drive using the manufacturers 'zero fill' HDD utility and then just attempt another fresh OS install.
I'm thinking about the original problem you were getting (a fuzzy picture) and I remember when I got that with a very old PC I once owned, it was a sign the PSU was on the way out. If you therefore have a spare (compatible) power supply unit lurking somewhere, you could try swapping that over to see if it makes a difference. Don't buy one specifically until you've ascertained it is definitely a faulty PSU to blame though (otherwise your local computer shop may have one that can 'test substitute' for you (especially if that is the issue and you end up buying the new PSU from them).