NEC DIRECTION SP B - SERVICE 1999, Service And Reference Manual

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4-4 Maintenance and Troubleshooting
Locating the Mouse Ball Cover
A – Mouse Ball Cover
4. Turn the mouse over and remove the ball.
5. Clean the mouse as follows:
„
Clean the mouse ball with tap water and a mild detergent, then dry it
with a lint-free cloth.
„
Remove any dust and lint from the mouse socket.
6.
Replace the mouse ball in its socket.
7.
Replace the ball cover and turn it counterclockwise until it locks in place.
Troubleshooting
This subsection provides information that helps isolate and repair system
malfunctions at the field level. Step-by-step instructions for diagnosing and
solving system hardware problems are provided. Technical support is available
at 1-888-632-2678.
If disassembly is required, see Section 5, “Disassembly and Reassembly.”
Connector pin assignments are given in Appendix B, “Connector Pin
Assignments.” Jumper settings are given in Appendix C, “System Resources.”
Diagnosing and Solving Problems
One beep indicates that the system has completed its power-on self-test (POST)
test. If intermittent beeping occurs, power off the system and try again. If the
beeping persists, see the “Beep Code Descriptions” table later in this section.
The following table summarizes problems that may develop during system
operation and lists (in sequential order) suggested corrective actions.