Quick Troubleshooting - NEC VERSA DOCK Service Manual

Quick Troubleshooting

This section summarizes problems that may develop during Versa Dock and
notebook operation and lists suggested corrective actions.
Problem
No power
Data on the LCD is unreadable
System halts during boot
sequence
I/O processing malfunctions
Diskette or LS-120 drive does
not work
Hard disk drive malfunction
Memory malfunction
7-2 Troubleshooting
Quick Troubleshooting
Corrective Actions
Check that the AC power cable is plugged into the
power connector of the Versa Dock. Also, check that
the AC power cable is plugged into a properly
grounded AC power outlet.
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.
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 hard disk.
Check for any BIOS error messages on the display
screen.
Check the connections of all internal devices.
Replace the CPU board or I/O board.
Check diskette type if correct and not faulty.
Replace the diskette drive.
Replace the I/O board.
Check if hard disk drive is set properly on CMOS
SETUP.
Check drive connections.
Check if disk drive is good.
Replace the CPU board or I/O board.
Check if the memory module is inserted properly.
Replace the memory module.
Replace the CPU board.