Lexmark MS812dn / MS812dtn
The printer dsiplays a 121.xx Service Fuser Error (except for 121.02. 121.16, 121.41 and 126.01 service errors, please follow troubleshooting steps in this article.
Make sure that the printer is plugged directly into a wall outlet.
Power off the printer, wait for a few seconds and power the printer back on.
LEGACY ID: SO7255
Troubleshooting a 121.24 fuser error code
Does an 126.01 Service error appear on your printer? Check out the following steps to troubleshoot the problem.