Interpreting Post Diagnostic Front Panel Leds And Audible Codes - HP 280 G1 Maintenance And Service Manual

Interpreting POST diagnostic front panel LEDs and audible codes

This section covers the front panel LED codes as well as the audible codes that may occur before or during
POST that do not necessarily have an error code or text message associated with them.
WARNING!
board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect
the power cord from the wall outlet and allow the internal system components to cool before touching.
NOTE: If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the
computer and refer to the following table to determine the front panel LED codes.
Recommended actions in the following table are listed in the order in which they should be performed.
Not all diagnostic lights and audible codes are available on all models.
Activity
White Power LED On.
White Power LED flashes every
two seconds.
Red Power LED flashes two
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
Red Power LED flashes four
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
Red Power LED flashes five
times, once every second,
followed by a two second pause.
Beeps stop after fifth iteration
but LEDs continue until problem
is solved.
100 Chapter 8 POST error messages
When the computer is plugged into an AC power source, voltage is always applied to the system
Beeps
None
None
2
4
5
Possible cause Recommended action
Computer on. None
Computer in Suspend to None required. Press any key or move the mouse to
RAM mode (some models wake the computer.
only) or normal Suspend
mode.
Processor thermal 1.
protection activated:
A fan may be blocked or not
turning. 2.
OR
The heat sink/fan assembly
is not properly attached to
3.
the processor.
4.
Power failure (power supply 1.
is overloaded).
2.
3.
4.
Pre-video memory error. CAUTION:
system board, you must unplug the computer power
cord before attempting to reseat, install, or remove
a DIMM module.
1.
Ensure that the computer air vents are not
blocked and the processor cooling fan is
running.
Open hood, press power button, and see if the
processor fan spins. If the processor fan is not
spinning, make sure the fan's cable is plugged
onto the system board header.
If fan is plugged in, but is not spinning, then
replace heat sink/fan assembly.
Contact an authorized reseller or service
provider.
Open the hood and ensure the 4 or 6-wire
power supply cable is seated into the
connector on the system board.
Check if a device is causing the problem by
removing ALL attached devices (such as hard,
diskette, or optical drives, and expansion
cards). Power on the system. If the system
enters the 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.
Replace the power supply.
Replace the system board.
To avoid damage to the DIMMs or the
Reseat DIMMs.