Lexmark 4500-00 Series - Page 85

Diagnostic information 2-55
4500–E220/E321/E323
Controller card error (ROM / NAND)
Indicates a failed controller card assembly. Replace the controller
card.
SRAM failure (959).
NAND failure (958).
ASIC failure (957).
Processor failure (956).
Code ROM or NAND failed cyclic redundancy check (CRC)
(955).