Troubleshooting; Error Messages - NEC POWERMATE P - SERVICE MANUAL 1996 Service And Reference Manual

4-4 Maintenance and Troubleshooting
4. Turn the mouse over and remove the ball.
5. Clean the mouse as follows:
n
Clean the mouse ball with tap water and a mild detergent, then dry it with a lint-
free cloth.
n
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 clockwise 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.
If disassembly is required, see Section 5. Connector pin assignments are given in
Appendix A. Jumper settings are given in Appendix B.

Error Messages

Messages may appear when running NEC utilities.
error and warning messages.
Table Section 4-2 PowerMate P System Error Messages
Message
Address Line Short
C: Drive Error
C: Drive Failure
Cache Memory Bad, Do Not
Enable Cache
CH-2 Timer Error
CMOS Battery State Low
CMOS Checksum Failure
CMOS System Options Not Set
CMOS Display Type Mismatch
Table Section 4-2
describes possible ISA NMI error messages.
Table Section 4-4
Description
Error in the address decoding circuitry on the system board.
Hard disk drive C not responding. Run Setup (see Section 2, Setup
and Operation) to correct the problem. Also, check C hard disk
drive type in Setup to make sure the hard disk drive type is correct.
Hard disk drive C not responding. Replace the hard disk drive.
Cache memory is defective.
Most AT systems include two timers. There is an error in Timer 2.
CMOS RAM is powered by a battery in the RTC/battery backup
chip. The battery power is low. Replace the system board.
After CMOS RAM values are saved, a checksum value is
generated for error checking. The previous value is different from
the current value. Run Setup (see Section 2).
The values stored in CMOS RAM do not match the type detected
by the BIOS. Run Setup (see Section 2).
The graphics type in CMOS RAM does not match the type
describes possible system