Epson DM-M820, Technical Reference Manual, Page: 212 / 324

8-22 Troubleshooting Rev. I
MEMORY ADDRESS ERROR
AT ... If an address error occurs during a memory test, that address is displayed.
This error may be caused by a malfunction of the memory (DIMM) or the main board
(including the memory controller). Try replacing these parts in turn to see if this solves the
problem.
If the memory has not been installed, this is indicated by an error beep at the early POST
stage.
MEMORY PARITY ERROR AT
... If a data parity error occurs during a memory test, that address is displayed.
This error may be caused by a malfunction of the memory (DIMM) or the main board
(including the memory controller). Try replacing these parts in turn to see if this solves the
problem.
If the memory has not been installed, This is indicated by an error beep at the early POST
stage.
MEMORY VERIFY ERROR AT
... If a data verify error occurs during a memory test, that address is displayed.
This error may be caused by a malfunction of the memory (DIMM) or the main board
(including the memory controller). Try replacing these parts in turn to see if this solves the
problem.
If the memory has not been installed, This is indicated by an error beep at the early POST
stage.
MEMORY TEST FAIL This error is displayed when an unexpected memory error other than above occurs
during a memory test.
This error may be caused by a malfunction of the memory (DIMM) or the main board
(including the memory controller). Try replacing these parts in turn to see if this solves the
problem.
If no memory has been installed, this is indicated by an error beep in the early POST
stage.
MANUFACTURING POST
LOOP This message is displayed when POST processing cannot be completed for some reason
(most likely due to errors related to the keyboard).
If no errors were found in the keyboard, hard disk, and floppy disk drive, try replacing the
main board.
PRESS A KEY TO REBOOT This message is displayed when an error that can be fixed by rebooting by a method
other than software reset (
CTRL+ALT+DEL ) is found.
Press a key to reboot the system.
If this error occurs frequently, there may be a malfunction of the main board or problems
in the system configuration. Try replacing the main board or check to see if there are any
problems in the system configuration.
PRESS F1 TO DISABLE NMI,
F2 TO REBOOT This message is displayed when a Non-Maskable Interrupt (NMI) occurs during POST.
Press F1 to clear the NMI and then continue with POST.
Press F2 to reboot.
If this error occurs frequently, there may be a malfunction of the main board or problems
in the system configuration. Try replacing the main board or check to see if there are any
problems in the system configuration.
SYSTEM HALTED, ( CTRL-ALT-
DEL ) TO REBOOT ...
This message is displayed when an error that can be fixed only by rebooting using
software reset (
CTRL+ALT+DEL ) is found.
Reboot the BIOS by using the software reset ( CTRL+ALT+DEL ).
If this error occurs frequently, there may be a malfunction of the main board or problems
in the system configuration. Try replacing the main board to see if this solves the problem.
POST messages (Continued)
Message Description