Table 1 Solving General Problems (continued)

Computer will not respond to USB keyboard or mouse.

Cause

Solution

 

 

 

CAUTION: When attempting to resume from

 

standby mode, do not hold down the power button

 

for more than four seconds. Otherwise, the

 

computer will shut down and you will lose any

 

unsaved data.

 

 

System has locked up.

Restart computer.

 

 

Computer date and time display is incorrect.

Cause

Solution

 

 

RTC (real-time clock) battery may need to be replaced.

NOTE: Connecting the computer to a live AC outlet prolongs the life of the RTC battery.

First, reset the date and time under Control Panel (Computer Setup can also be used to update the RTC date and time). If the problem persists, replace the RTC battery. See the Hardware Reference Guide for instructions on installing a new battery, or contact an authorized dealer or reseller for RTC battery replacement.

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

Cause

Solution

 

 

The Num Lock key may be on.

Press the Num Lock key. The Num Lock light should not be on if you want to use the arrow keys. The Num Lock key can be disabled (or enabled) in Computer Setup.

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

ENWW

Basic Troubleshooting 17