Question about Lexmark Optra M412 Laser Printer

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Lexmark Optra M412

Display was not working properly and now it is diplaying a 939 service system board error.

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  • Anonymous Jan 06, 2009

    Display is very dim, same error code, and continuos beeps.

  • Anonymous Feb 12, 2009

    I turn on the Optra m412 and it says 939 Service System Board. This model doesn't even show up on Lexmark's web site.

  • zabrina liang May 11, 2010

    Can you verify the error number? I do not find a 939 error code in the knowledgebase



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Error 939 means --
RIP Communications Lost 
Controller EngineCommunications Lost 
The controller board and the engine board cannot
communicate with one another.

Solution --
POR several times
Check each board
for secure ground.
Replace the assys
in the following
1. Controller Bd
2. Engine Board
3. Intterconnect

Posted on Mar 09, 2009


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Go to
Locate the appropriate authorization code for your printer model from the following list and enter it:

Optra S (4059) series printers: 4059engn.
Optra T610, Optra T612, Optra T614, Optra T616 printers: optrateng.
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We recommend you choose to save the file within a directory on your computer's hard drive.
Once it has been saved, go ahead and run the file. The downloaded files are self-extracting ZIP files. Running this file will create a set of .PJL files and a file entitled Readme.1st. The Readme.1st file also contains directions for sending the file over through a parallel connection.

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Service Fuser Error appears when the fuser does not warm to the required temperature. For this error on this Lexmark model, the manual states you should power off the printer and power it back on, and if it is not plugged into a wall power point, change it to a power point mounted directly on the wall. Personally, I never got a Lexmark printer to work doing this, but this is in the manual. If this won't help, and the printer is under warranty, you should log it in with the servicing company.

You can find the fuser at the back of the printer, remove the cover and there it is. It holds in two screws and a power connection. If the printer is out of warranty, your next option is to change the fuser which costs around $200, so I think you would be better off getting a new printer unless you find a second hand one on Ebay.

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939 service system board; what it's mean.

First, make sure the printer power is off and remove the RIP board. When you turn the printer back on, the only option on the display will be to perform the test. Pressing the button next to that begins the test. The page that comes out should have just a lot of lines printed on it. If this does not print or is somehow messed up, then the problem must be with the engine board. If this page prints and looks OK, then it is probably the RIP board that should be replaced. Please keep in mind that this test cannot be considered to be conclusive but it can be used to make an educated guess about which component is failing.

When the printer beeps five times and the operator panel is blank, there are several things that might cause this. It could be the op panel, the op panel cable, the Low Voltage Power Supply (LVPS), or the engine board. To find out which component is failing, the printer would need to be checked out by a service technician and the failing component replaced by him/her.

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