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.

 

 

Too many applications running.

1. Close unnecessary applications to free up 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 (Microsoft Windows XP) or

 

 

Start > All Programs > Accessories > Run (Microsoft

 

 

Windows Vista) and type msconfig. On the Startup tab

 

 

of the System Configuration Utility, uncheck applications

 

 

that you do not want to launch automatically.

 

 

CAUTION: Do not prevent applications from launching

 

 

at startup that are required for proper system operation.

 

2.

Add more memory.

 

 

 

ENWW

Solving General Problems 11

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HP dx2400 manual Computer date and time display is incorrect Cause Solution, Poor performance is experienced Cause Solution