Ok here it is, I have a customers computer I'm working on. When I cold boot the PC it says there is a Disk I/O error. Now, I have tried switching cables on the HD and Floppy, I changed the settings in the CMOS and BIOS, I even changed the HD. Also when the computer has to be restarted, the screen goes blank. I tried switching video cards and some cmos settings nothing works. 