HP 280 G1 manual Solving CD-ROM and DVD problems, Computer Setup utility, Security Network Boot

Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.)

Cause	Solution
Memory is installed incorrectly or is bad.	1.	Reseat DIMMs. Power on the system.
	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.

Solving CD-ROM and DVD problems

If you encounter CD-ROM or DVD problems, see the common causes and solutions listed in the following table or to the documentation that came with the optional device.

System will not boot from CD-ROM or DVD drive.

Cause	Solution
The device is attached to a SATA port that has been hidden in the	Run the Computer Setup utility and ensure Device Available is
Computer Setup utility.	selected for the device's SATA port in Security > Device Security.
Removable Media Boot is disabled in the Computer Setup utility.	Run the Computer Setup utility and enable booting to removable
	media in Storage > Storage Options. Ensure CD-ROM is enabled
	in Storage > Boot Order.
Network Boot is enabled in Computer Setup.	Run the Computer Setup utility and disable Network Boot in
	Security > Network Boot.
Non-bootable CD in drive.	Try a bootable CD in the drive.
Boot order not correct.	Run the Computer Setup utility and change boot sequence in
	Storage > Boot Order.
Drive not found (identified).
Cause	Solution
Cable could be loose.	Check cable connections.
The system may not have automatically recognized a newly	See reconfiguration directions in the Solving Hardware
installed device.	Installation Problems on page 81 section. If the system still does
	not recognize the new device, check to see if the device is listed
	within Computer Setup. If it is listed, the probable cause is a
	driver problem. If it is not listed, the probable cause is a hardware
	problem.
	If this is a newly installed drive, run the Computer Setup utility
	and try adding a POST delay under Advanced > Power-On
	Options.
The device is attached to a SATA port that has been hidden in	Run the Computer Setup utility and ensure Device Available is
Computer Setup.	selected for the device's SATA port in Security > Device Security.
Drive responds slowly immediately after power-up.	Run Computer Setup and increase the POST Delay in Advanced >
	Power-On Options.

88 Chapter 7 Troubleshooting without diagnostics