HP dc5100 - Microtower PC Service & Reference Manual page 187

Solving Minor Problems (Continued)
Problem
Poor performance is
experienced.
(continued)
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. Beeps continue
for five iterations after
which the LED flashes
will continue until the
problem is resolved.
Service Reference Guide, dc5100
Cause
Program previously
accessed did not release
reserved memory back to
the system
Virus resident of the hard
drive.
Too many applications
running.
Cause unknown.
Processor thermal
protection activated:
A fan may be blocked or
not turning.
OR
The heatsink is not
properly attached to the
processor.
376220-001
Possible Solution
Restart the computer.
Run virus protection program.
Close unnecessary applications.
Add more memory.
Restart the computer.
1. Ensure computer air vents are not
blocked and the cooling fan is
running.
2. Open hood, press power button,
and see if the processor fan
spins. If not spinning, make sure
the fan's cable is plugged onto
the system board header. Ensure
the fan is fully/properly seated or
installed.
3. Replace the processor fan.
4. Reseat processor heatsink and
verify that the fan assembly is
properly attached.
D–3