Quick Troubleshooting - NEC SX Service And Reference Manual

Quick Troubleshooting

This section summarizes problems that may develop during system operation
and lists suggested corrective actions.
Problem
No power
Data on the LCD is unreadable
Battery power does not last long
System halts during boot
sequence
I/O processing malfunctions
7-2 Troubleshooting
Quick Troubleshooting
Corrective Action
Check that the AC adapter is plugged into the power
connector of the system. Also, check that the AC
adapter is plugged into a properly grounded AC power
outlet.
If using the battery as the main power source, check if
the battery pack is the right type, is charged, and is
inserted correctly.
Check the I/O board of the system. Is it inserted into
the CPU board connector properly? Otherwise, replace
the I/O board.
Check LCD Panel View Expansion in BIOS, Press Fn-
F10 to toggle Panel View Expansion for DOS mode.
Check if installed VGA driver is correct.
Check the VGA controller chip on the I/O board for any
loose soldering.
Replace the CPU board.
Make sure that the power management features are
enabled.
Recharge the battery pack for 2 hours or up to 100%
before using again.
Replace the battery pack.
Check condition of selected boot device (diskette, hard
disk or CD-ROM) for bad boot track or incorrect OS
files.
Try booting from a new bootable diskette and recopy
or repartition the hard disk.
Check for any BIOS error messages on the display
screen.
Replace the CPU board or I/O board.
Check the connections of all internal devices.
Replace the CPU board or I/O board.