NEC PowerMate V486 Series Manual page 210

PROBLEM
Diskette Drive Errors
A diskette won't load.
A Non-System Disk or
Disk Error message is
displayed.
Monitor Problems
The monitor screen
remains dark.
A distorted image appears
on your monitor screen.
Troubleshooting
CORRECTIVE ACTION
Check that the diskette is inserted correctly.
Verify that the system unit and monitor
power lamps are on and that the power-on
screen appears on the screen.
If the diskette is not formatted, format it. See
your MS-DOS documentation.
If the diskette drive busy lamp does not light
when you load the diskette, try a different
diskette. If this loads, the problem is in the
software. Call your software dealer.
If you are starting from the diskette drive,
insert a diskette with system files into
drive A. If bootable diskette does not boot,
use Setup to verify that the initial boot
parameter is set to diskette drive A and
not a hard disk.
Check that the monitor power cable is
connected to the monitor and a power
outlet.
Be sure that the monitor signal cable is
connected to the system unit.
Check that the system unit and monitor
power lamps are on, all monitor connections
are tight, and the brightness and contrast
controls are adjusted.
Press the space bar, or move the mouse
to wake the system out of a power
management mode (if set).
Adjust the video controls on your monitor.
If this doesn't help, turn the monitor off for
a few seconds, then turn it back on.
Solving Problems 7-3