Did you completely unhook the CD from the controller cable? If you did and the system boots, you've got a jumper problem (Slave vs Master). If it still doesn't, try disabling the secondary IDE controller (assuming your main HD is on the first) and see if it boots. If it does, and there was nothing left attached to the secondary anyway, chances are the #2 IDE controller is bad..... Good Luck!
"Most people would sooner die than think; in fact, they do so. "
Disconnect all cables, Floppy Drive IDE Check the Memory SDRAM make sure all DIMMS are in place.
Go to CMOS settings.
Go to STANDARD SETTINGS
SET All to AUTO
DETECT ALL IDE DRIVES.
HIT SKIP FOR CD ROM
SAVE AND EXIT.
I tried that without success. Luckily we have some identical PCs, we bought a blank BIOS chip, read one of the working chips, and programmed the blank one. That worked.
Thanks to all who replied - it is a comforting to know one can find help this quickly !!