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