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 stop after fifth iteration but
LEDs continue flashing.)
Cause
Solution
Processor thermal protection activated:
A fan may be blocked or not turning.
OR
The heat sink 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.
Open the access panel, press the power button, and see
if the processor fan (or other system fan) spins. If the fan
does not spin, make sure the fan cable is plugged onto
the system board header.
3.
If fan a plugged in and not spinning, replace it.
Power LED flashes Red four times, once every second, followed by a two second pause, and the
computer beeps four times. (Beeps stop after fifth iteration but LEDs continue flashing.)
Cause
Solution
Power failure (power supply is overloaded).
1.
If equipped with a voltage selector, check that the
voltage selector, located on the rear of the power supply
(some models), is set to the appropriate voltage. Proper
voltage setting depends on your region.
2.
Open the access panel and ensure the power supply
cable is seated into the connector on the system board.
3.
Check if a device is causing the problem by removing
ALL attached devices (such as hard drives or optical
drives and expansion cards). Power on the system. If the
system enters POST, then power off and replace one
device at a time and repeat this procedure until failure
occurs. Replace the device that is causing the failure.
Continue adding devices one at a time to ensure all
devices are functioning properly.
4.
Replace the power supply.
5.
Replace the system board.
The incorrect external power supply adapter is being used on
the All-in One or USDT.
The power supply adapter must be at the correct power rating
and use the Smart ID technology before the system will power
up. Replace the power supply adapter with the HP-supplied
power supply adapter.
Solving Power Problems
153
Summary of Contents for Compaq Pro 6305
Page 4: ...iv About This Book ...
