Solving Keyboard And Mouse Problems - HP Pro 3420 Maintenance & Service Manual

Table A-8
Printer prints garbled information.
Cause
The cables may not be connected properly.
Printer memory may be overloaded.
Printer is offline.
Cause
The printer may be out of paper.

Solving Keyboard and Mouse Problems

If you encounter keyboard or mouse problems, see the documentation that came with the equipment
and to the common causes and solutions listed in the following table.
Table A-9
Keyboard commands and typing are not recognized by the computer.
Cause
Keyboard connector is not properly connected.
Program in use has stopped responding to commands.
Keyboard needs repairs.
Computer is in standby mode.
Cursor will not move using the
Cause
The Num Lock
96 Appendix A Troubleshooting Without Diagnostics
Solving Printer Problems (continued)
Solving Keyboard Problems
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key may be on.
Solution
Reconnect all cables.
Reset the printer by turning it off for one minute, then turn it
back on.
Solution
Check the paper tray and refill it if it is empty. Select online.
Solution
1. On the Windows XP Desktop, click Start > Shut Down.
On the Windows Vista or Windows 7 Desktop, click
Start, click the arrow on the lower right corner of the
Start menu, then select Shut Down.
2. After the shutdown is complete, reconnect the keyboard
to the back of the computer and restart the computer.
Shut down your computer using the mouse and then restart
the computer.
See the Worldwide Limited Warranty for terms and
conditions.
Press the power button to resume from standby mode.
CAUTION:
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.
keys on the keypad.
Solution
Press the
on if you want to use the
be disabled (or enabled) in Computer Setup.
When attempting to resume from standby
Num Lock key. The Num Lock light should not be
arrow keys. The Num Lock key can