Lexmark XC9455
When turning on the printer, an ”Invalid Engine Code” with “Do Not Power Off” message appears on the printer display.
Perform a Power‑on Reset by turning off the printer and turning it back on after a couple of seconds.
If the issue persists, search for more information related to this issue or contact support for further assistance.
An “Invalid Engine Code” error message indicates a problem with one of the internal operating programs of the printer. The printer is not able to receive, and process print jobs until the printer is reset.
Does a 900 error message appear on your printer? Check out the following steps to troubleshoot the problem.