HP D3K72UT D3K72UT#ABA manual Table C-2Diagnostic Front Panel LEDs and Audible Codes

Table C-1Numeric Codes and Text Messages (continued)

Control panel message	Description	Recommended action
Network Server Mode Active and No	Keyboard failure while Network Server	1.	Reconnect keyboard with computer
Keyboard Attached	Mode enabled.		turned off.
		2.	Check connector for bent or missing
			pins.
		3.	Ensure that none of the keys are
			depressed.
		4.	Replace keyboard.
Parity Check 2	Parity RAM failure.	Run Computer Setup and Diagnostic
		utilities.

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! 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 C-2Diagnostic Front Panel LEDs and Audible Codes

Activity	Beeps	Possible Cause	Recommended Action
Green Power LED On.	None	Computer on.	None

Green Power LED flashes	None	Computer in Suspend to
every two seconds.		RAM mode (some models
		only) or normal Suspend
		mode.

None required. Press any key or move the mouse to wake the computer.

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 137