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

5 9

16

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 followup 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 motherboard.

0072h Configuration mismatch in CMOS. Reset the system, then run BIOS Setup and check settings. Replace motherboard.

0073h Bad CMOS RAM size. Reset the system, then run BIOS Setup and check settings. Replace motherboard.

0074h Bad CMOS time. Reset the system, then run BIOS Setup and check settings. Replace 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 motherboard.

0079h Replace the motherboard.

0083h - Replace the BIOS IC. Replace the

0086h motherboard.

0087h Replace the motherboard.

0088h Replace the BIOS IC.

0090h -

Replace the BIOS IC. Replace the

0096h

motherboard.

009Ah -

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.

00FFh

Rerun the test. (Possible diagnostic

 

programming error.)

Memory Tests

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

0100h - Replace the motherboard.

0101h

0102h Replace the BIOS IC.

0120h - For 01FFFFFFh and below, replace the

0150h motherboard. For 02000000h and above, 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

0180h For 01FFFFFFh and below, replace the motherboard. For 02000000h and above, replace the RAM board (each 01000000h represents 16MB).

3-14 Troubleshooting and Diagnostics

HP OmniBook 4100