Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five
times. (Beeps stop after fifth iteration but LEDs continue flashing.)
Cause
Solution
Memory is installed incorrectly or is bad. 1. Reseat DIMMs. Power on the system.
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.
Solving Processor Problems
If you encounter processor problems, common causes and solutions are listed in the following table.
Table D-13 Solving Processor Problems
Poor performance is experienced.
Cause
Solution
Processor is hot. 1. Make sure the airflow to the computer 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.
Solving CD-ROM and DVD Problems
If you encounter CD-ROM or DVD problems, see the common causes and solutions listed in the
following table or to the documentation that came with the optional device.
Table D-14 Solving CD-ROM and DVD Problems
System will not boot from CD-ROM or DVD drive.
Cause
Solution
The device is attached to a SATA port that has been disabled
in the Computer Setup utility.
Run the Computer Setup utility and ensure the device's SATA
port is enabled in Storage > Storage Options.
Legacy operating system does not support boot devices
attached to SATA 4 or SATA 5 ports.
Connect boot devices to SATA 0 or SATA 1 ports.
Removable Media Boot is disabled in the Computer Setup
utility.
Run the Computer Setup utility and enable booting to
removable media in Storage > Storage Options. Ensure CD-
ROM is enabled in Storage > Boot Order.
Table D-12 Solving Memory Problems (continued)
166 Appendix D Troubleshooting Without Diagnostics ENWW
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