Computer will not respond to USB keyboard or mouse.

Cause

Solution

 

 

Keyboard or mouse is not connected to computer.

Connect keyboard and mouse cables to computer.

 

 

Computer is in standby mode.

To resume from standby mode, press the power button or

 

press any key.

 

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.

 

 

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.

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.

 

 

 

86 Appendix C Troubleshooting