Solving hardware installation problems, Solving hardware installation problems 237 – HP DC7800 User Manual

Page 249

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.

Table D-10

Solving Mouse Problems

Mouse does not respond to movement or is too slow.

Cause

Solution

Mouse connector is not properly plugged into the back of the
computer.

Shut down the computer using the keyboard.

Press the

Ctrl

and

Esc

keys at the same time (or press

the

Windows logo

key) to display the Start menu.

Use the

arrow

keys to select Shut Down and then press

the

Enter

key.

After the shutdown is complete, plug the mouse
connector into the back of the computer (or the keyboard)
and restart.

Program in use has stopped responding to commands.

Shut down the computer using the keyboard then restart the
computer.

Mouse may need cleaning.

Remove the roller ball cover on the mouse and clean the
internal components.

Mouse may need repair.

See the Worldwide Limited Warranty for terms and conditions.

Wireless device error.

Check the software, if available, for device status.

Check/replace device batteries.

Reset receiver and mouse.

Computer is in standby mode.

Press the power button to resume from standby mode.

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.

Mouse will only move vertically, horizontally, or movement is jerky.

Cause

Solution

Mouse roller ball or the rotating encoder shafts that make
contact with the ball are dirty.

Remove roller ball cover from the bottom of the mouse and
clean the internal components with a mouse cleaning kit
available from most computer stores.

Solving Hardware Installation Problems

You may need to reconfigure the computer when you add or remove hardware, such as an additional
drive or expansion card. If you install a plug and play device, Windows automatically recognizes the

Table D-9

Solving Keyboard Problems (continued)

Solving Hardware Installation Problems 237