I have an HP Pavilion 7125 w/128MB RAM. I recently installed an Intel 166MHz non-MMX CPU. The BIOS now recognizes the CPU at the proper speed (166 MHz) but no longer recognizes the HDD or CD-ROM in BIOS. The hard drive is a Quantum Fireball in the 1.6GB range. I checked support at HP and Quantum (now Maxtor) but cannot find any model numbers that correspond with any numbers on the HDD. I can boot to the A: drive only. Anyone have any suggestions? ZDaddy

did you try running auto detect in the bios? also check and see if you may have knocked off the cables.

Thanks for the prompt reply, Bud. Cables are all intact. I let auto-detect run for almost 15 minutes to no avail. Should I let it run longer? Thanks, ZDaddy

Are you sure that your #1 pin (stripe on IDE Cable) is definately on pin #1 of all your IDE devices, i.e. Hard Drive(s), CD ROM. (Normally that pin is the one closest to the power plug.)

Thank you also, Maurice. It was never necessary to unplug either the HDD or the CD-ROM. In addition, no jumper settings (clock speed, voltage, etc.) were changed... I am at a quandry here. Thanks, ZDaddy

unplug power cables the attach the hdd power cable only. unplug power and data cable to CDROM. See if hdd is detected in CMOS.

I'd recheck the cables and jumpers again. If it's hanging in auto detect a misjumpered drive can cause that. Verify in cmos that IDE controllers are enabled. Also if the label on a Quantum doesn't give it's capacity there is usually a sticker on the bottom of the drive on the IDE connector that will tell you what it is.