NEC VERSA DOCK - SERVICE, Service Manual

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7-2 Troubleshooting
Quick Troubleshooting
This section summarizes problems that may develop during Versa Dock and
notebook operation and lists suggested corrective actions.
Quick Troubleshooting
Problem Corrective Actions
No power 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.
Data on the LCD is unreadable 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.
System halts during boot
sequence 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.
I/O processing malfunctions Check the connections of all internal devices.
Replace the CPU board or I/O board.
Diskette or LS-120 drive does
not work Check diskette type if correct and not faulty.
Replace the diskette drive.
Replace the I/O board.
Hard disk drive malfunction 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.
Memory malfunction Check if the memory module is inserted properly.
Replace the memory module.
Replace the CPU board.