Lexmark C540 Service Manual page 54

5025-2xx, 4xx
Service error messages (1xx, 9xx) (continued)
Error code
950.xx Service
NVRAM Failure
951.xx Service
NVRAM Failure
952.xx Service
NVRAM Failure:n
953.xx Service
NVRAM Failure
954.xx Service
NVRAM Failure
955.xx Service
Code CRC <loc>
956.00 Service
System Board
956.01 Service
System Board
2-20
Service Manual
Description
There is a mismatch between controller
EEPROM and mirror.
• 950.00 through 950.29 codes:
mismatch between controller and
mirror
• 950.30 through 950.60 codes:
mismatch between secure and
controller
Mismatch between controller EEPROM
and mirror.
• 951.00 through 951.29 codes:
mismatch between controller and
mirror
• 951.30 through 951.60: mismatch
between secure and controller
A recoverable MVRAM Cyclic
Redundancy Check (CRC) error
occurred. n is the offset at which the
error occurred.
NVRAM chip failure with mirror.
The NVRAM chip failure with controller
part.
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.
Controller board failure. Processor
failure.
Processor over temperature.
Action
Go to "950.xx NVRAM Failure service
check" on page 2-26.
Performing a POR will clear this error.
Replace the controller board. See
"Controller board removal" on
page 4-19.
Replace the controller board. See
"Controller board removal" on
page 4-19.