Troubleshooting

Problem

Cause

Solution

Computer will not respond to USB keyboard or mouse.

System has locked up.

Restart the computer.

 

 

Keyboard or mouse is not

Connect keyboard and mouse cables

connected to computer.

to computer.

 

 

Computer is in

Press the power button to resume from

standby mode.

standby mode.

ÄCAUTION: 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

RTC (real-time clock)

display is incorrect.

battery may need to be

 

replaced.

 

Connecting the

 

computer to a live

 

AC outlet prolongs

 

the life of the

 

RTC battery.

First, reset the Date and Time Properties in the 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 on the Documentation CD for instructions on installing a new battery.

Cursor will not move

The Num Lock key

Press the Num Lock key. The

using the arrow keys on

may be on.

Num Lock light should not be on if you

the keypad.

 

want to use the arrow keys. The Num

 

 

Lock key can be disabled (or

 

 

enabled) in Computer Setup.

 

 

 

 

Poor performance is

Processor is hot.

1.

Ensure airflow to the computer is

experienced.

 

 

not blocked. Leave a 4-inch

 

 

 

(10.2-cm) clearance on all vented

 

 

 

sides of the computer and monitor

 

 

 

to permit required airflow.

 

 

2.

Ensure fans are connected and

 

 

 

working properly (some fans only

 

 

 

operate when needed).

3. Ensure the processor heatsink is installed properly.

6

www.hp.com

Troubleshooting Guide

Page 9
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HP dx2200 manual Standby mode

dx2200 specifications

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