Hard Disk Fail (10), (20), or (80)
Hard drive not connected properly
Familiarize yourself with the dangers of ESD.
Verify that the hard drive is properly connected to the computer. The back of the hard drive should have two cables connected to it, the IDE cable and the power cable. Verify these two cables are firmly connected to the back of the hard drive.
Next, verify that the IDE cable is connected to the motherboard.
Finally, if this is a new hard drive or another IDE drive has been connected to the computer, verify that the jumpers are properly set.
Hard drive not set up in CMOS properly
Verify that the CMOS setup for the hard drive is properly set up. The computer hard drive settings should either be defined, or if the computer is a Pentium or higher the hard drive should be defined as Auto.
Hard drive cable is bad
If the above two recommendations do not resolve the issue, replace the IDE cable or switch the cable with a known good IDE or EIDE cable.
Other bad hardware
If you continue to experience the same issue after following the above recommendations, likely either the hard drive or the motherboard's IDE interface is bad. We recommend replacing the hard drive. If this does not resolve the issue then unfortunately the connector on the motherboard is bad and it should be replaced.