Table 2-1Solving General Problems (continued)

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 heatsink 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.

 

 

 

Too many applications running.

1.

Close unnecessary applications to free up memory.

 

2.

Add more memory. Some applications run in the

 

 

background and can be closed by right-clicking on their

 

 

corresponding icons in the task tray. To prevent these

applications from launching at startup, go to Start > Run (Windows XP) or Start > Accessories > Run

ENWW

Solving General Problems 11

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HP dc7900 manual Solving General Problems, There is no sound or sound volume is too low Cause Solution

dc7900 specifications

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