HP Dc7100 Troubleshooting Guide - Page 76

Diagnostic Front Panel LEDs and Audible Codes, Activity, Beeps, Possible Cause, Recommended Action

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POST Error Messages Diagnostic Front Panel LEDs and Audible Codes (Continued) Activity Beeps Possible Cause Recommended Action Red Power LED 2 flashes two times, once every second, followed by a two second pause. Processor thermal protection activated: A fan may be blocked or not turning. OR The heatsink/fan assembly is not properly attached to the processor. 1. Ensure that the computer air vents are not blocked and the processor cooling fan is running. 2. Reboot the system and observe if there are any POST messages stating that one or more of the fans are not detected. If a fan is not detected during POST, unplug the unit, open the chassis and ensure that the all the fans are plugged in correctly. 3. If fan is plugged in and seated properly, and the POST message still appears, then replace the processor fan. 4. Reseat processor heatsink and verify that the fan assembly is properly attached. See the appropriate Service Reference Guide for instructions on how to reinstall the heatsink. Correct heatsink installation is critical to proper system operation. 5. Contact an authorized reseller or service provider. Red Power LED 3 flashes three times, once every second, followed by a two second pause. Processor not installed (not an indicator of bad processor). 1. Check to see that the processor is present. 2. Reseat the processor. A-14 www.hp.com Troubleshooting Guide

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A–14
www.hp.com
Troubleshooting Guide
POST Error Messages
Red Power LED
flashes two times,
once every second,
followed by a two
second pause.
2
Processor thermal
protection
activated:
A fan may be
blocked or not
turning.
OR
The heatsink/fan
assembly is not
properly attached
to the processor.
1. Ensure that the computer air vents
are not blocked and the processor
cooling fan is running.
2. Reboot the system and observe if
there are any POST messages
stating that one or more of the fans
are not detected. If a fan is not
detected during POST, unplug the
unit, open the chassis and ensure
that the all the fans are plugged in
correctly.
3. If fan is plugged in and seated
properly, and the POST message
still appears, then replace the
processor fan.
4. Reseat processor heatsink and
verify that the fan assembly is
properly attached. See the
appropriate Service Reference
Guide for instructions on how to
reinstall the heatsink. Correct
heatsink installation is critical to
proper system operation.
5. Contact an authorized reseller or
service provider.
Red Power LED
flashes three times,
once every second,
followed by a two
second pause.
3
Processor not
installed (not an
indicator of bad
processor).
1. Check to see that the processor is
present.
2. Reseat the processor.
Diagnostic Front Panel LEDs and Audible Codes
(Continued)
Activity
Beeps
Possible Cause
Recommended Action