HP d260 Business Desktop d260 Series, Service Reference Guide, First Edition - Page 75

Problem, Cause, Possible Solution

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Solving Minor Problems (Continued) Problem Cause Computer powered off automatically. Processor thermal protection activated: A fan may be blocked or not turning. OR The heatsink is not properly attached to the processor. System does not power on and the LEDs on the front of the computer are not flashing. System unable to power on. Possible Solution 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. Press and hold the power button for less than 4 seconds. If the hard drive LED turns amber, then: 1. Check that the voltage selector is set to the appropriate voltage. 2. Remove the expansion cards one at a time. 3. Replace the system board. OR Press and hold the power button for less than 4 seconds. If the hard drive LED does not turn on amber then: 1. Check that the unit is plugged into a working AC outlet. 2. Open hood and check that the power button harness is properly connected to the system board. 3. Check that both power supply cables are properly connected to the system board. 4. Replace the system board. Service Reference Guide, d260 377977-AA1 D-3

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Service Reference Guide, d260
377977-AA1
D–3
Computer powered off
automatically.
Processor thermal
protection activated:
A fan may be blocked or
not turning.
OR
The heatsink is not
properly attached to the
processor.
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.
System does not power
on and the LEDs on the
front of the computer
are not flashing.
System unable to power
on.
Press and hold the power button for
less than 4 seconds. If the hard drive
LED turns amber, then:
1. Check that the voltage selector is
set to the appropriate voltage.
2. Remove the expansion cards one
at a time.
3. Replace the system board.
OR
Press and hold the power button for
less than 4 seconds. If the hard drive
LED does not turn on amber then:
1. Check that the unit is plugged
into a working AC outlet.
2. Open hood and check that the
power button harness is properly
connected to the system board.
3. Check that both power supply
cables are properly connected to
the system board.
4. Replace the system board.
Solving Minor Problems
(Continued)
Problem
Cause
Possible Solution