Troubleshooting; Problem Checklist; Diagnosing And Solving Problems - NEC VERSA S Service Manual

5-4 Troubleshooting and Repair
5. Using a non-conductive tool, slide the switch toward the front of the unit, and
then slide it back to its original position (toward the rear of the unit).
6. Turn off the system power.
Replace the keyboard (see "Replacing the Keyboard" in Section 4, Options).
7.
Run the SCU to reenter the system configuration information (see Section 2,
8.
Settup and Operation).

TROUBLESHOOTING

This subsection provides information that helps isolate and repair computer malfunctions at
the field level. Step-by-step instructions on diagnosing and solving computer problems are
provided.
If disassembly is required, see "Disassembly and Reassembly" later in this section. Connec-
tor pin assignments are explained in Appendix A.

Problem Checklist

First check the items in the following list. If these do not help, see the following subsection

"Diagnosing and Solving Problems."

n
Power is connected to the computer.
n
The electrical outlet to which the AC adapter is connected is working. Test the
outlet by plugging in a lamp or other electrical device.
n
If using battery power, the battery pack is charged.
n
All cables are tightly connected.
n
The display setting is configured correctly.
n
The display brightness and contrast are adjusted properly.
n
System parameters are set correctly through the SCU.
Diagnosing and Solving Problems
Successful computer power-up is indicated by a beep. This should occur each time the
computer is powered up. If an error condition exists, the system will respond in one of the
following ways:
n
displays an error message
n
transmits a beep code.