Texas Instruments Extensa 660 Series Maintenance Manual page 66

Message
Diskette drive A failure
Diskette read failure -
press F1 to retry boot, F2
for SETUP utility
Display adapter failed,
using alternate
Gate A20 failure
Fixed disk configuration
error
Fixed disk controller
failure
Fixed disk read failure -
press F1 to retry boot, F2
for SETUP utility
Pointer device failure
5-6 Troubleshooting Procedures
Table 5-2 Power On Self Test Error Messages
Possible Cause
The drive failed or is missing.
The disk is either not
formatted or is defective.
The primary video adapter
failed.
The keyboard controller is
not accepting command,
specifically, the enable and
disable A20 command.
The specified configuration is
not supported or doesn't
match the actual hardware
installed.
The fixed disk may be
defective.
The fixed disk may be
configured incorrectly or is
defective.
The PS/2-style mouse failed.
Action
Check the drive to determine the
problem.
Replace the disk with a bootable
disk and retry.
Check the primary video
adapter.
Check the keyboard controller
and system board. Turn the
power off, then back on again. If
the problem persists contact
qualified service personnel.
Correct the fixed disk
configuration.
Try rebooting. If that doesn't
work, replace the fixed disk.
Check the drive type selected in
SETUP. Try rebooting. If that
does not work, replace the fixed
disk.
Try rebooting. If problem
persists, check the mouse, cable
and connector.