Lexmark C543dn - Page 55

Diagnostic information 2-19
5025-2xx, 4xx
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953.xx Service
NVRAM Failure
NVRAM chip failure with mirror.
954.xx Service
NVRAM Failure
The NVRAM chip failure with controller
part.
955.xx Service
Code CRC <loc>
The Code ROM or NAND flash failed
the Cyclic Redundancy Check (CRC)
check or the NAND experienced an
uncorrectable multi-bit failure. <loc>
indicates the source of the failure and
has one of the following values:
• CRC Failure: The source is a
failing package indicated by Pn
where n is the package number.
This error could occur on a
controller with ROM or NAND flash
and could occur as a result of the
CRC check done when the
machine is powered on. The range
of package numbers is from 0 to
15.
• Error Correction Code (ECC)
Failure: The source is a failing
page indicated by Bn where “n” is
the page number. This error occurs
only if a multi-bit failure is detected
during the ECC execution. Single
bit failures will be corrected
automatically and will not result in a
service error. The range of page
numbers is from 0 to 1023.
956.00 Service
System Board
Controller board failure. Processor
failure.
Replace the controller board. See
“Controller board removal” on
page 4-20.
956.01 Service
System Board
Processor over temperature.
957.xx Service
System Board
Controller board failure. ASIC failure.
958.xx Service
NAND Failure
Printer has performed more than 100
“shift and reflash” operations as a
result of ECC bit corrections.
959.01 Service
Invalid Firmware
Controller verification failure of system
boot code
Update firmware or replace the controller
board. See “Controller board removal”
on page 4-20.
959.02 Service
Invalid Firmware
Failure to authenticate Signature
Verification Code.
Update firmware or replace the controller
board. See “Controller board removal”
on page 4-20.
959.03 Service
Invalid Firmware
Signature verification Code failure to
authenticate a code partition.
Update firmware or replace the controller
board. See “Controller board removal”
on page 4-20.
959.04 Service
Invalid Firmware
Jump to unverified address. Update firmware or replace the controller
board. See “Controller board removal”
on page 4-20.
Service error messages (1xx, 9xx) (continued)
Error code Description Action