HP Book 900 manual OmniBook Diagnostic Error Codes, Code Suggestions System Tests

Note that the serial and parallel port tests are more thorough if you connect a loop-back connector to the port before running the test for that port. See the wiring diagrams below.

5 9

1 6

13

25

These connections are not used.

Diodes are 1N4004 or equivalent (IF=1A, VF=1V@1A, VR=30-400V)

1 14

Figure 3-3. Serial and Parallel Loopback Connectors

Interpreting the Results

∙The following table lists test groups, error codes, and suggestions for follow-up actions. Consider these suggestions in combination with other troubleshooting information.

Table 3-3. OmniBook Diagnostic Error Codes

Code Suggestions

System Tests
0001h - Reseat or replace the CPU module.
0008h
0009h	Replace the motherboard.

0010h -	Reseat or replace the CPU module.
002Fh
0030h -	Replace the motherboard.
0040h
0041h	Unrecognized interrupts. Run BIOS Setup and
	check IRQ assignments for all devices.
0050h -	Replace the motherboard.
0070h
0071h	Bad CMOS checksum. Reset the system, then
	run BIOS Setup and check settings. Replace
	the motherboard.
0072h	Configuration mismatch in CMOS. Reset the
	system, then run BIOS Setup and check
	settings. Replace the motherboard.
0073h	Bad CMOS RAM size. Reset the system, then
	run BIOS Setup and check settings. Replace
	the motherboard.
0074h	Bad CMOS time. Reset the system, then run
	BIOS Setup and check settings. Replace the
	motherboard.

0075h -	Reset the system. Replace the motherboard.
0076h
0077h	Replace the motherboard.
0078h	Bad CMOS checksum. Reset the system, then
	run BIOS Setup and check settings. Replace
	the motherboard.
0079h	Replace the motherboard.
0083h -	Replace the BIOS IC. Replace the
0086h	motherboard.
0087h	Replace the motherboard.
0088h	Replace the BIOS IC.

Code	Suggestions
008Ah	Replace the motherboard..
0090h -	Replace the BIOS IC. Replace the
009Eh	motherboard.
009Fh	Insufficient DOS memory. Load fewer device
	drivers.
00A0h	No repair. (ESCD not supported.)
00A1h	Replace the BIOS IC. Replace the
	motherboard.
00A2h -	No repair. (ESCD not supported.)
00A3h
00A4h	Replace the BIOS IC.
00A5h -	No repair. (ESCD not supported.)
00A6h
00A7h	Replace the BIOS IC. Replace the
	motherboard.
00C0h -	Replace the CPU module.
00CCh
00FFh	Rerun the test. (Possible diagnostic
	programming error.)

Memory Tests

The addresses below are absolute (32-bit) addresses. These addresses are not in the segment:offset format.

0100h -	Replace the motherboard.
0101h
0102h	Replace the BIOS IC. Replace the
	motherboard.
0120h -	For 01FFFFFFh (OB900†) or 03FFFFFFh
0150h	(OB900B) and below, replace the motherboard.
	Above that, replace the RAM board (each
	01000000h represents 16MB).
0160h	Address bus short. Remove any RAM board
	and rerun the test. Check the CPU module for
	shorts. Replace the motherboard.
0170h -	Replace the motherboard.
0172h

3-14 Troubleshooting and Diagnostics HP OmniBook 900