Errors - Lexmark MX71x Service Manual

950–958 errors
950–958 error messages
Error code Description
950.xx NVRAM mismatch failure—mismatch between
controller board EEPROM and control panel mirror.
".xx" codes:
• 00-29— mismatch between system and mirror
•
30-60—mismatch between secure and system
952.xx A recoverable NVRAM Cyclic Redundancy Check (CRC)
error occurred—n is the offset at which the error
occurred.
POR the printer.
953.xx NVRAM chip failure with mirror part
Replace the controller board.
954.xx NVRAM chip failure with system part
Replace the controller board.
955.xx The Code ROM or NAND flash failed the Cyclic
Redundancy Check (CRC) or the NAND experienced an
uncorrectable multi-bit failure.
Replace the controller board.
956.xx The flatbed scanner and ADF cannot properly
communicate with the controller board in the base
printer.
956.01 Processor Overtemp
Replace the controller board.
957.xx RIP card failure—ASIC failure
Replace the controller board.
958.xx Controller Board NAND Failure—printer has
performed more than 100 shift and reflash operations
as a result of ECC bit corrections.
Replace the controller board.
NVRAM mismatch failure service check
Warning—Potential Damage: When replacing any of the following components:
•
Control panel assembly
•
Controller board assembly
Replace only one component at a time. Replace the required component and perform a POR before replacing a second
component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never replace two
or more of the components listed above without a POR after installing each one or the printer will be rendered
inoperable.
Action
Go to "NVRAM mismatch failure service check" on
page 265.
POR the printer.
Go to "Controller board removal" on page
Go to "ADF/scanner communication failure service
check" on page
Go to "Controller board removal" on page
Diagnostic information
265
267.
7463
422.
422.