8-4 Solving System Problems
POST Error Messages
The NEC Versa has a built-in checking program that automatically tests its components
when you turn the system power on. This diagnostic test is called the Power-On Self-
Test (POST). If the system finds a problem during POST, the system displays an error
message. If this happens, follow the instructions in the POST error message table.
POST Error Messages
Error Message
Explanation
Diskette drive A error
Drive A: is present but fails the BIOS POST diskette tests. Check
to see that the drive is defined with the proper diskette type in
Setup.
Extended RAM Failed at offset:
nnnn
Extended memory not working or not configured properly at offset
nnnn.
Failing Bits: nnnn
The hex number nnnn is a map of the bits at the RAM address (in
System, Extended, or Shadow memory) which failed the memory
test. Each 1 (one) in the map indicates a failed bit.
Fixed Disk 0/1/Disk Controller
Failure
Fixed disk is not working or not configured properly. Check to see
if fixed disk is attached properly. Run Setup to make sure the
fixed-disk type is correctly identified.
Incorrect Drive A type – run
SETUP
Type of floppy drive A: not correctly identified in Setup.
Keyboard Controller error
The keyboard controller failed test. You may have to replace
keyboard or controller.
Keyboard Error – Keyboard not
working
Keyboard error nn BIOS discovered a stuck key and displays the
scan code nn for the stuck key.
Operating system not found
Operating system cannot be located on either drive A: or drive C:.
Enter Setup and see if fixed disk and drive A: are properly
identified.
Parity Check 1 – Parity error
found in the system bus
BIOS attempts to locate the address and display it on the screen.
If it cannot locate the address, it displays ????.
Parity Check 2 – Parity error
found in the I/O bus
BIOS attempts to locate the address and display it on the screen.
If it cannot locate the address, it displays ????.
