Lexmark T642 Service Manual - Page 69

4061-xx0 Service error codes (9xx.xx) (continued) Error code Sub codes Display text 954 .00 955 .00 Code CRC 956 .00 System board 957 .00 System board 958 .00 Nand failure Description Action Replace the interconnect card. See "Interconnect card assembly removal" on page 4-53. Warning: When replacing any one of the following components: • Operator panel assembly (or upper front cover) • System board assembly • Interconnect card assembly Only replace 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. Warning: Never install and remove components listed above as a method of troubleshooting components. Once a component has been installed in a printer, it can not be used in another printer. It must be returned to the manufacturer. CRC failure or ECC code failure on the system board. Replace the system board. See "System board and inner shield removal" on page 4-76. This error indicates a system board processor failure. Replace the system board. See "System board and inner shield removal" on page 4-76. This error indicates a system board processor failure. Replace the system board. See "System board and inner shield removal" on page 4-76. Printer has performed more than 100 Replace the system board. See "shift and replace" operations as a result "System board and inner of EC bit corrections. shield removal" on page 4-76. Diagnostic information 2-29