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Undetermined problems
If this computer has a parallel ATA hard disk drive, make sure that the hard disk drive is jumpered as a master and the optical drive is jumpered as a slave.
1.
2.Remove or disconnect the following components (if installed) one at a time.
a.External devices (modem, printer, or mouse)
b.Any adapters
c.Memory modules
d.Extended video memory
e.External Cache
f.External Cache RAM
g.Hard disk drive
h.Diskette drive
3.
4.Repeat steps 1 through 3 until you find the failing device or adapter.
If all devices and adapters have been removed, and the problem continues, replace the system board.