I have an old Pentium 4 in a SFF. The ranges on the pc were 166 to 350 in the BIOS screen. I set it to 260 and now when I turn on the computer, the P4 HT screen never appears. If I load a cd into the drive it spins and then nothing happens. I tried loading the bios set up cd, kill disk, ubunti and still it's not booting. Did I kill my P4 by trying to over clock it or is there a way to get it to boot up properly again?