NEC Versa 2400 Series Service Manual page 94

5-10 Troubleshooting and Repair
Problem
Battery Power does not last
System halts during boot sequence
I/O processing malfunctions
Diskette drive does not work
Hard disk drive malfunction
Memory malfunction
External keyboard or PS/2 mouse
doesn't work
Table 5-5 Quick Troubleshooting
Corrective Actions
Make sure that the power management features
are enabled.
Recharge the battery pack for 1½ hour before
using again.
Replace the battery pack.
Check condition of selected bootload device
(diskette or hard disk) 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.
Replace system board.
Check the connections of all internal devices.
Replace system board.
Check if floppy drive cable is connected
properly.
Check diskette type if correct and not faulty.
Replace diskette drive.
Replace system board.
Check if hard disk drive is set properly on CMOS
SETUP.
Check drive cables and connections.
Check if disk drive is good.
Replace the system board.
Check if the memory module is inserted properly.
Replace the memory module.
Replace the system board.
Check if keyboard or mouse are connected
properly. Check Y-cable if it is being used. Power
off system first before plugging in the device.
Replace the keyboard or mouse.
Replace the system board.