Service and Maintain
Service Reference Guide, dc7600 390742-002 D–17
Troubleshooting Without Diagnostics
Keyboard commands and
typing are not recognized
by the computer.
(continued)
Keyboard needs
repairs.
Replace the keyboard.
Wireless device error. 1. Check software, if available, for
device battery status.
2. Replace device batteries.
3. Reset receiver and keyboard.
Computer is in
standby mode.
Press the power button to resume
from standby mode.
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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
any unsaved data will be lost.
Cursor will not move using
the arrow keys on the
keypad.
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.
Mouse does not respond to
movement or is too slow.
Mouse connector is
not properly plugged
into the back of the
computer.
1. Shut down the computer using
the keyboard.
2. Plug the mouse connector into
the back of the computer (or the
keyboard) and restart the
computer.
Program in use has
stopped responding
to commands.
Shut down the computer using the
keyboard and then restart the
computer.
Mouse may need
cleaning.
Remove the roller ball cover on the
mouse and clean it.
Mouse needs repairs. Replace the mouse.
Wireless device error. 1. Check software, if available, for
device battery status.
2. Replace device batteries.
3. Reset receiver and mouse.
Computer is in
standby mode.
Press the power button to resume
from standby mode.
Ä
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 or horizontally, or
movement is jerky.
Mouse roller ball is
dirty.
Remove roller ball cover from the
bottom of the mouse and clean it.
Solving Keyboard and Mouse Problems (Continued)
Problem Cause Solution