Advanced Troubleshooting 229
Dell Diagnostics
When to Use the Dell Diagnostics
If you experience a problem with your computer, perform the checks in "Solving Problems"
and run the Dell Diagnostics before you contact Dell for technical assistance. Running the
Dell Diagnostics may help you resolve the problem without contacting Dell. If you do
contact Dell, the test results can provide important information for Dell's service and
support personnel.
The Dell Diagnostics allows you to:
• Perform express, extended, or custom tests on one or all devices
• Select tests based on a symptom of the problem you are having
• Choose how many times a test is run
• Display test results
• Suspend testing if an error is detected
• Access online help information that describes the tests and devices
• Receive status messages that tell you whether tests completed successfully
4-2-1 No time tick
4-2-2 Shutdown failure
4-2-3 Gate A20 failure
4-2-4 Unexpected interrupt in protected
mode
4-3-1 Memory failure above address
0FFFFh
4-3-3 Timer-chip counter 2 failure
4-3-4 Time-of-day clock stopped
4-4-1 Serial or parallel port test failure
4-4-2 Failure to decompress code to
shadowed memory
4-4-3 Math-coprocessor test failure
4-4-4 Cache test failure
Code Cause
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