Question about Lexmark Optra M412 Laser Printer
Display was not working properly and now it is diplaying a 939 service system board error.
Error 939 means --
RIP Communications Lost
Controller EngineCommunications Lost
The controller board and the engine board cannot
communicate with one another.
POR several times
Check each board
for secure ground.
Replace the assys
in the following
1. Controller Bd
2. Engine Board
Posted on Mar 09, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
The Mirror Motor of the printhead is unable to reach operating speed. This means you have to replace the printhead.
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