HP E1Z74UT User Manual download pdf (Page 162)

Cursor will not move using the arrow keys on the keypad.

Cause Solution

The

Num Lock key is turned on. Press the Num Lock key. The Num Lock light must be off if you

want to use the

arrow keys on the keypad. You can also

disable or enable the

Num Lock key in Computer Setup at

Advanced > Device Options.

There is no sound or sound volume is too low.

Cause Solution

System volume may be set low or muted.

1. Check the Computer Setup 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.

In case of forgotten password, power loss, or computer

malfunction, you must manually disable the Smart Cover lock .

A key to unlock the Smart Cover Lock is not available from

HP. Keys are typically available from a hardware store.

Poor performance.

Cause Solution

Processor is too 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.

152 Chapter 8 Troubleshooting without diagnostics

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HP E1Z74UT User Manual Page 162