Lexmark OptraTM Service Manual page 25

4026-0XX
Blinking Operator Panel LED
Controller Card Failure
Optional Memory Error
Fan Failure Error
ROM Checksum Error
Base Memory Error
Action
Replace Controller board
Replace the optional memory SIMM.
If this does not correct the problem,
replace the controller board.
Go to the "Fan Service Check" on
page 2-17.
Replace the ROM SIMM. If this does
not correct the problem, replace the
controller board.
Replace Controller board
Diagnostic Information 2-3