HP dx2200 - Microtower PC Service & Reference Manual page 105

Solving Hardware Installation Problems (Continued)
Problem
Power LED flashes Red five
times, once every second,
followed by a two second
pause.
Service Reference Guide, dx2200 MT
Cause
Memory is installed
incorrectly or is bad.
415606-001
Troubleshooting Without Diagnostics
Solution
1. Reseat DIMMs.
2. Replace DIMMs one at a time to
isolate the faulty module.
3. Replace third-party memory
with HP memory.
4. Replace the system board.
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