I uninstalled my cpu fan to clean it. After re-installing it my computer will not boot up. It has power but the monitor appears to be in "sleep mode". I cannot get my A drive to work to use the boot disk. I have a 1.2 gig athlon thunderbird with FIC AZ11EA motherboard, 384 mb ram, EVGA geforce 2 MX video card running windows XP. I have tried clearing the Cmos to no avail. Any help would be greatly appreciated.