HP 1105 manual Options SERR# Generation Disable, Activity Beeps Possible Cause Recommended Action

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 or a PCI/PCIe device is	Run Computer Setup and Diagnostic
	asserting a SERR#.	utilities. To disable a PCI/PCIe device from
		asserting a SERR#, run the Computer
		Setup utility and select Advanced > Bus
		Options > SERR# Generation > Disable.

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.

Activity	Beeps	Possible Cause	Recommended Action
Green Power LED On.	None	Computer on.	None
Green Power LED flashes	None	Computer in Suspend to	None required. Press any key or move the
every two seconds.		RAM mode (some models	mouse to wake the computer.
		only) or normal Suspend
		mode.

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 133