HP Pro 4300 manual Interpreting Post Diagnostic Front Panel LEDs

Interpreting POST Diagnostic Front Panel LEDs

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! When the computer is plugged into an AC power source, voltage is always applied to the system 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.

Table 10-2Diagnostic Front Panel LEDs and Audible Codes

Activity	Blink	Possible Cause	Recommended Action
	s
White Power LED flashes	5	Pre-video memory error.	CAUTION: To avoid damage to the DIMMs or the
five times, once every			system board, you must unplug the computer power
second, followed by a two			cord before attempting to reseat, install, or remove a
second pause. Beeps stop			DIMM module.
after fifth iteration but			1.	Reseat DIMMs.
LEDs continue until
problem is solved.			2.	Replace DIMMs one at a time to isolate the faulty
				module.
			3.	Replace third-party memory with HP memory.
			4.	Replace the system board.
White Power LED flashes	6	Pre-video graphics error.	For systems with a graphics card:
six times, once every			1.	Reseat the graphics card.
second, followed by a two
second pause. Beeps stop			2.	Replace the graphics card.
after fifth iteration but
LEDs continue until			3.	Replace the system board.
problem is solved.
			For systems with integrated graphics, replace the
			system board.
White Power LED flashes	7	System board failure (ROM	Replace the system board.
seven times, once every		detected failure prior to
second, followed by a two		video).
second pause. Beeps stop

after fifth iteration but LEDs continue until problem is solved.

White Power LED flashes	8	Invalid ROM based on bad
eight times, once every		checksum.

second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved.

1.Reflash the system ROM with the latest BIOS image.

2.Replace the system board.

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