Specifications

Table 2–2 (Cont.) POST and Boot Messages
POST No. Error Name Description Solution
540 Scan and initialize video
ROM
530 Verify video configura-
tion
520 Initialize console
redirection
500 Display sign on message
490 Timer tick interrupt test No timer tick interrupt Replace the system
board.
480 Shutdown test Shutdown failure Replace the system
board.
461 Software port NMI
failure
Replace the system
board.
460 EISA extended devices
test
Fail safe timer NMI
failure
Replace the system
board.
450 Chipset initialization 6
441 Unexpected interrupt in
protected mode
The computer
received an
interrupt while
in protected mode
(probably while
testing memory).
If the problem
persists, replace
the system board.
440 Size memory above 64
KB
Gate A20 failure The computer
cannot switch into
protected mode.
Replace the system
board.
(continued on next page)
2–8 System Troubleshooting