What you will see
The printer displays a 'Scanner Failure' message. The message is also accompanied by an 84x type numeric error code (where 'x' can be any number); i.e., 840, 841, 842, 843, etc.
The 84x Error indicates that the MFP has detected a communications problem with its scanner. A service call may be required to resolve this issue. Certain rare occurrences, however, such as a power fluctuation or a static discharge in the vicinity of the MFP, can cause a false 84x Error message to display. In such cases, the error is only temporary and can be easily resolved without service.
Restart the device and check whether error re-appears. If the error clears, proceed with Step 3 to update the printer's firmware with latest level. Otherwise, continue with the next step.
If the error did not clear, first set the printer to Invalid Engine Code status. To do this:
Download the latest firmware for your printer.
After downloading the firmware, proceed with any of the methods below to perform the update.
Note: Updating the firmware should resolve this type of error code. If the error persists, or if you are having difficulties updating the printer's firmware, please contact Lexmark Technical Support.
Still need help?
Please contact Lexmark Technical Support if you need additional assistance. NOTE: When calling for support, you will be asked for your machine/model type and serial number (SN). If you need help locating these, click here.
Please call from near the printer in case the technician on the phone asks you to perform a task involving the printer.