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Maintenance and Service Guide Compaq Presario 4900, 5000, & 5100 Series Computers
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Diagnostic error codes
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> | TROUBLESHOOTING Diagnostic Error Codes Diagnostic error codes occur if the system recognizes a problem while running the Compaq Utilities program. These error codes help identify possibly defective subassemblies. Tables listed on this page give possible error codes, descriptions of each error condition, and actions required to resolve the error condition.
> IMPORTANT: | Retest the system after completing each step. If the problem has been resolved, do not proceed with the remaining steps.
For assistance in the removal and replacement of a particular subassembly, see Removal and Replacement Procedures.
100-xx | Processor | 800-xx | Monochrome video | 3200-xx | Audio
200-xx | Memory | 1100-xx | Serial | 3300-xx | CD or DVD
300-xx | Keyboard | 1200-xx | Modem | 6600-xx | CD or DVD
400-xx | Parallel (printer) | 1700-xx | Hard drive | 8600-xx | Pointing device interface
500-xx | Monitor | 1900-xx | Tape drive |  |
600-xx | Diskette drive | 2400-xx | Video |  |
> Keyboard error codes
> Error Code | Description | Recommended Action
> 301-xx | Keyboard short test, 8042 self-test failed | The following steps apply to error codes 301-xx through 304-xx:
> 1 | Check the keyboard connection. If disconnected, turn the computer off and connect the keyboard.
> 2 | Replace the keyboard and retest.
> 3 | Replace the system board and retest.
> 302-xx | Keyboard long test failed
> 303-xx | Keyboard LED test, 8042 self-test failed
> 304-xx | Keyboard typematic test failed
> Parallel (printer) error codes
> Error Code | Description | Recommended Action
> 401-xx | Printer failed or not connected | The following steps apply to error codes 401-xx through 498-xx:
> 1 | Connect the printer.
> 2 | Check power to the printer.
> 3 | Install the loop-back connector and retest.
> 4 | Replace system board and retest.
> 402-xx | Printer data register failed
> 403-xx | Printer pattern test failed
> 498-xx | Printer failed or not connected
> Monochrome video error codes
> Error Code | Description | Recommended Action
> 802-xx | Video memory test failed | The following step applies to error codes 802-xx through 824-xx: Replace the system board and retest.
> 824-xx | Monochrome video text mode test failed
> Serial error codes
> Error Code | Description | Recommended Action
> 1101-xx | Serial Port Test | The following steps apply to error codes 1101-xx through 1109-xx:
> 1 | Check the switch settings on the serial/parallel device, if applicable.
> 2 | Replace the system board and retest.
> 1109-xx | Clock Register Test
> Modem error codes
> Error Code | Description | Recommended Action
> 1201-xx | Modem Internal Loop-Back Test | The following steps apply to error codes 1201-xx through 1210-xx:
> 1 | Refer to modem documentation for correct Setup procedures.
> 2 | Check the modem line.
> 3 | Replace the modem and retest.
> 1202-xx | Modem Time-Out Error
> 1203-xx | Modem External Termination Test
> 1204-xx | Modem Auto Originate Test
> 1206-xx | Dial Multifrequency Tone Test
> 1210-xx | Modem Direct Connect Test
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