I just installed a slave drive on a dell computer. The computer had been running properly however, after installation the hard drive is not recognized. I removed the slave drive and reconnected OLD drive to original configuration and still have same problem. I also removed battery to clear cmos.

any help would be greatPerhaps the other IDE drives are configured to Cable SELECT and not Master/Slave.

Or you put the cable in the wrong way around if it's an older IDE cable/system.

Did you set the jumpers on each drive correctly ? ?

The original HDD in the machine should be jumpered as "master with slave" and connected to the end of the ribbon cable.

The new HDD you installed should be jumpered as slave and connected to the middle connecter of the ribbon cable.

Right now the BIOS is having a BRAIN fart so you MIGHT have to retry it a few times.

patio. 8-)You were right! It had a "brain fart". It's now working after restarting several times. Thanks for your help!!!!!Congrats !

And Welcome Aboard...