4–8 Technical Reference Guide
Troubleshooting
Faults (System LED is Blinking Red)
The following tables provide additional information about each specific fault
associated with the various possible Diagnostic LED lighting sequences when the
system LED is red (fast blink 1.5Hz).
LED1 LED2 LED3 LED4 Fault Solution
Unknown Faults
Unknown fault. Contact your HP Support
Engineer.
Memory Faults
Mismatched memory
pairs.
Use the memory
sequence diagram in
“Installing Memory
Modules” on page 3-11.
Uncorrectable memory
error.
Replace memory.
No memory installed. Install memory in matched
pairs (see “Installing
Memory Modules” on
page 3-11).
Bad memory. One or
more DIMMs are bad
or not seated properly.
Reseat the DIMMs. If the
error persists, replace
them.
Firmware Fault
System firmware hang. Contact your HP Support
Engineer.
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