HP XW3400 - Manual (Page 160)

Solving processor problems
If you encounter processor problems, common causes and solutions are listed in the following table.
Table D-14 Solving Processor Problems
Poor performance is experienced.
Cause Solution
Processor is hot. 1 . Make sure the airflow to the workstation is not blocked.
2 . Make sure the fans are connected and working properly
(some fans only operate when needed).
3 . Make sure the processor heatsink is installed properly.
Power LED flashes Red three times, once every second, followed by a two second pause.
Cause Solution
Processor is not seated properly or not installed. 1 . Check to see that the processor is present.
2 . Reseat the processor.
150 Appendix D Troubleshooting without diagnostics ENWW