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. 9 5 These connections are not used. Diodes are 1N4004 or equivalent (I F =1A, V F =1V@1A, V R =30-400V) 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 3-14 Troubleshooting and Diagnostics HP OmniBook 900 25 6 1 Code Suggestions System Tests 0001h - 0008h Reseat or replace the CPU module. 0009h Replace the motherboard. 0010h - 002Fh Reseat or replace the CPU module. 0030h - 0040h Replace the motherboard. 0041h Unrecognized interrupts. Run BIOS Setup and check IRQ assignments for all devices. 0050h - 0070h Replace the motherboard. 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 - 0076h Reset the system. Replace the motherboard. 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 - 0086h Replace the BIOS IC. Replace the motherboard. 0087h Replace the motherboard. 0088h Replace the BIOS IC. Code Suggestions 008Ah Replace the motherboard.. 0090h - 009Eh Replace the BIOS IC. Replace the motherboard. 009Fh Insufficient DOS memory. Load fewer device drivers.
00A0h No repair. (ESCD not supported.) 00A1h Replace the BIOS IC. Replace the motherboard. 00A2h - 00A3h No repair. (ESCD not supported.) 00A4h Replace the BIOS IC. 00A5h - 00A6h No repair. (ESCD not supported.) 00A7h Replace the BIOS IC. Replace the motherboard. 00C0h - 00CCh Replace the CPU module. 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 - 0101h Replace the motherboard. 0102h Replace the BIOS IC. Replace the motherboard. 0120h - 0150h For 01FFFFFFh (OB900†) or 03FFFFFFh (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 - 0172h Replace the motherboard.