NP Troubleshooting Guide
Updated 30
May 2002
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Remove
the cap on the bad key with a chip extractor. Spray contact cleaner into the
key well. Repeatedly depress the contact in order to clear it out. Don't use
rubbing alcohol to clean the key well, as it can add a residue to the contact.
If
this method of cleaning solves the problem, clean the adjacent keys as well.
The
keyboard does not work at all
1.
Is the cable plugged in securely?
2.
If the cable connection is good and the keyboard still does not
work, connect a working keyboard of the same type to the computer. If the
second keyboard works, you have verified that the problem is in the keyboard
and not in the computer.
3.
If the second keyboard does not work, connect first keyboard to a
computer that works properly. If this works, then the problem must be with the
original computer.
4.
If the problem is in the keyboard, check the cable.
5.
If the problem is not the cable, replace the keyboard.
6.
If the problem is with the computer, consider the following: On
the systemboard, the two chips that effect the keyboard functions are the
keyboard chip and the ROM BIOS chip, You might choose to swap each of these
chips on the systemboard. Otherwise the entire systemboard may have to be
replaced.
1.
The problem may be a dirty contact. Try cleaning the key switch
with contact cleaner.
2.
Very high humidity and excess moisture may short key switch
contacts and cause keys to repeat. The problem will usually resolve itself once
the humidity level returns to normal. You can hasten the drying process by
using a fan to blow air at the keyboard.
This problem is usually caused by a bad chip on the keyboard. Try
swapping the keyboard for one you know is good. If the problem goes away,
replace the original keyboard with a new one.
Problems with the mouse
The
cursor on the screen is difficult to move with the mouse
The
rollers inside the mouse housing collect dirt and dust and occasionally need
cleaning. Remove the cover to the mouse ball from the bottom of the mouse.
Clean the rollers with a cotton swab dipped in a very small amount of liquid
soap.
