![](/images/new-backgrounds/1284778/284778127x1.webp)
Note that the serial and parallel port tests are more thorough if you connect a
5 9
1 6
13
25
These connections are not used.
Diodes are 1N4004 or equivalent (IF=1A, VF=1V@1A,
1 14
Figure 3-3. Serial and Parallel Loopback Connectors
Interpreting the Results
∙The following table lists test groups, error codes, and suggestions for
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
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 |
|
HP OmniBook 900 |