HP ProSignia 120 Maintenance And Service Manual page 27

If you receive one of the error messages listed in Table 2-2, follow the recommended
action.
Message
CMOS checksum invalid, run SCU
CMOS failure, run SCU
Diskette controller error
Diskette track 0 failed
Hard disk controller error
Keyboard controller failure
Keyboard failure
No interrupts from Timer 0
ROM at xxxx (LENGTH yyyy) with
nonzero checksum (zz)
Time/Date corrupt - run SCU
Hard disk xx failure (or error)
Unsupported memory module
Table 2-2
Warning Messages
Description
CMOS RAM information has been
corrupted.
CMOS RAM has lost power.
The diskette drive controller failed
to respond to the recalibrate
command.
The diskette drive cannot read
track 0 of the diskette in the drive.
The hard drive controller failed to
respond to the reset command.
The keyboard failed the self-test
command.
The keyboard failed to respond to
the RESET ID command.
The periodic timer interrupt is not
occurring.
An illegal adapter ROM was located
at the specified address.
The time and date stored in the
real time clock have been
corrupted, possibly by a power
loss.
A failure or an error occurred when
trying to access the hard drive.
An EDO memory module was
installed in the memory expansion
slot.
Recommended Action
Run Computer Setup to reinitialize
CMOS-RAM.
Run Computer Setup to reinitialize
CMOS-RAM.
If there is no diskette drive in the
system, run Computer Setup to
properly configure the CMOS-RAM
to show no diskette drive present. If
the problem persists, or if a diskette
drive is present, complete these
steps until the problems is solved:
1. Check diskette drive connections.
2. Replace diskette drive.
3. Replace system board.
Try another diskette. If the problem
persists, you may need to replace
the diskette drive.
Check the drive parameters. Turn
off the system and check all related
connections.
Replace the system board.
Replace the keyboard. If the
problem persists, replace the
system board.
Replace the system board.
Check the external adapter (such as
a video card) to determine if it is
causing the conflict.
1. Run Computer Setup.
2. If problem persists, replace
auxiliary battery.
3. If problems persists, replace
system board.
1. Run Scan disk.
2. Check disk in DOS and
Windows 95. If problem persists,
refer to Table 2-11.
Remove the EDO memory module
and replace with SDRAM memory
module.
Troubleshooting 2-5