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Maintenance & Service Guide
Presario 7900 Series Personal Computers
Models: 7922, 7930, 7935, 7940, 7947, 7950, 7970, 7973, 7985


Troubleshooting

Diagnostics Software

Diagnostics error codes occur if the system recognizes a problem while running the Compaq Utilities TEST program. These error codes help identify possible defective subassemblies.

IMPORTANT:

Retest the system after completing each step. At the point where the problem is resolved, do not proceed with the remaining steps.

For assistance in the removal and replacement of a particular subassembly, see Removal and Replacement Procedures.

Click on the desired error code range or corresponding test for a list of descriptions of each error condition and actions required to resolve the error condition.


Error Code Range

Test

101-199 Processor Test
200-215 Memory Test
301-304 Keyboard Test
400-498 Parallel Printer Test
501-516 Graphics Controller Test
600-699 Diskette Drive Test
1101-1109 Serial Test
1201-1210 Modem Communications Test
1700-1799 Hard Drive Test
3206 Audio Test
3301-3305
66xx
CD or DVD Drive Test
8601 Pointing Interface Device Test

 

Processor Test Error Codes

Error Code Description Recommended Action
101-xx CPU test failed Replace the system board and retest.
102-xx Processor error 1. Run Computer Checkup or Setup
and retest.

2. Replace the processor and retest.

103-xx DMA controller failed Replace the system board and retest.
104-xx Interrupt controller failed Replace the system board and retest.
105-xx Port error Replace the system board and retest.
106-xx Keyboard controller self-test failed Replace the system board and retest.
107-xx CMOS RAM test failed The following steps apply to error codes 107-xx through 109-xx:

1. Replace the battery/clock module and retest.

2. Replace the system board and retest.

108-xx CMOS interrupt test failed
109-xx CMOS clock test failed
110-xx Programmable timer test failed The following step applies to error codes 110-xx through 113-01:

Replace the system board and retest.

111-xx Refresh detect test failed
112-xx Speed test failed
113-01 Protected mode test failed
114-xx Speaker test failed 1. Verify the speaker connection.

2. Replace the system board and retest.

199-xx Installed devices test failed 1. Check system configuration.

2. Verify cable connections.

3. Check switch settings.

4. Run Compaq Utilities.

5. Replace the system board and retest.

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Memory Test Error Codes

Error
Code

Description

Recommended Action
200-xx Invalid memory configuration 1. Verify memory module value compatibility.

2. Reinsert memory in the correct location.

201-xx Memory machine ID test failed The following steps apply to error codes 201-xx and 202-xx:

1. Flash the ROM and retest.

2. Replace the memory and retest.

3. Replace the system board and retest.

202-xx Memory system ROM checksum failed
203-xx Memory write/read test failed The following steps apply to error codes 203-xx through 215-xx:

1. Remove one memory module at a time until the error message stops.

2. Replace other removed modules one at a time, testing each to ensure the error does not return.

3. Replace the system board and retest.

204-xx Memory address test failed
205-xx Walking 1's test failed
206-xx Increment pattern test failed
209-xx RAM Long test failed
211-xx Random pattern test failed
214-xx Noise test failed
215-xx Random address test failed

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Keyboard Test 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

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Parallel Printer Test 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

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Graphics Controller Test Error Codes

Error
Code

Description

Recommended Action
501-xx Graphics controller test failed The following step applies to error codes
501-xx through 516-xx:

Replace the system board and retest.

502-xx Graphics memory test failed
503-xx Graphics attribute test failed
504-xx Graphics character set test failed
505-xx Graphics 80 × 25 mode 9 × 14 character cell test failed
506-xx Graphics 80 × 25 mode 9 × 14 character cell test failed
507-xx Graphics 40 × 25 mode test failed
508-xx Graphics 320 × 200 mode color set 0 test failed
509-xx Graphics 320 × 200 mode color set 1 test failed
510-xx Graphics 640 × 200 mode test failed
511-xx Graphics screen memory page test failed
512-xx Graphics gray scale test failed
514-xx Graphics white screen test failed
516-xx Graphics noise pattern test failed

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Diskette Drive Test Error Codes

Error
Code

Description

Recommended Action
600-xx Diskette ID drive types test failed The following steps apply to error codes 600-xx through 698-xx:

1. Replace the diskette and retest.

2. Check and/or replace the diskette power and signal cables and retest.

3. Replace the diskette drive and retest.

4. Replace the system board and retest.

601-xx Diskette format failed
602-xx Diskette read test failed
603-xx

604-xx

Diskette write, read, compare test failed

Diskette random seek test failed

605-xx Diskette ID media test failed
606-xx Diskette speed test failed
697-xx Diskette type error
698-xx Diskette drive speed not within limits
699-xx Diskette drive/media ID error 1. Replace media.

2. Run Setup.

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