HP Pro 4300 C9H67UT#ABA, D8C84UT#ABA There is no sound or sound volume is too low Cause Solution

There is no sound or sound volume is too low.

Cause	Solution
System volume may be set low or muted.	1.	Check the F10 BIOS settings to make sure the internal
		system speaker is not muted (this setting does not
		affect the external speakers).
	2.	Make sure the external speakers are properly
		connected and powered on and that the speakers'
		volume control is set correctly.
	3.	Use the system volume control available in the
		operating system to make sure the speakers are not
		muted or to increase the volume.

Cannot remove computer cover or access panel.

Cause Solution

Smart Cover Lock, featured on some computers, is locked.

Unlock the Smart Cover Lock using Computer Setup.

The Smart Cover FailSafe Key, a device for manually disabling the Smart Cover Lock, is available from HP. You will need the FailSafe Key in case of forgotten password, power loss, or computer malfunction. Order PN 166527-001 for the wrench-style key or PN 166527-002 for the screwdriver bit key.

Poor performance is experienced.

Cause	Solution
Processor is hot.	1. Make sure airflow to the computer is not blocked. Leave
		a 10.2-cm (4-inch) clearance on all vented sides of the
		computer and above the monitor to permit the required
		airflow.
	2.	Make sure fans are connected and working properly
		(some fans only operate when needed).
	3.	Make sure the processor heat sink is installed properly.
Hard drive is full.	Transfer data from the hard drive to create more space on
	the hard drive.
Low on memory.	Add more memory.
Hard drive fragmented.	Defragment hard drive.
Program previously accessed did not release reserved	Restart the computer.
memory back to the system.
Virus resident on the hard drive.	Run virus protection program.

100 Appendix C Troubleshooting Without Diagnostics