HP Dc7100 Troubleshooting Guide - Page 26

Power LED flashes Red two, appropriate Service Reference

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Troubleshooting Without Diagnostics Solving Power Supply Problems (Continued) Problem Cause Solution Computer powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the computer beeps two times. Processor thermal protection activated: A fan may be blocked or not turning. OR The heatsink 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. Troubleshooting Guide www.hp.com 2-11

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Troubleshooting Guide
www.hp.com
2–11
Troubleshooting Without Diagnostics
Computer powered off
automatically and the
Power LED flashes Red two
times, once every second,
followed by a two second
pause, and the computer
beeps two times.
Processor thermal
protection activated:
A fan may be blocked
or not turning.
OR
The heatsink 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.
Solving Power Supply Problems
(Continued)
Problem
Cause
Solution