If your computer comes on but says
"Disk Boot Failure," first check to make sure there is no floppy disc
in drive "A." Then you need to check your CMOS settings to make sure
the hard disk is set up correctly.
If all CMOS settings are lost, then you probably
need to replace your battery that holds these settings internally.
If your battery checks good, then your motherboard could have reset
these by accident, or by static shock. We have seen cheaper motherboards
do this at the drop of a hat!!
If all these things check out, then you should
scan your hard drive for viruses, then scan your hard drive for errors
in the boot sector. In order to do either of these you must have a
good bootable disk (such as your Windows startup disk). If these all
check out, then you could have lost your command.com startup file,
and this can be copied from your startup disk to your hard disk.
If you cannot access the hard disk, then you
may have a bad hard drive, and need to have the unit brought in for
repair.