Follow these steps to fix the issue.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Perform a power-on-reset (POR) by powering the printer off and power it back on.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Open the printer front door and remove the supplies as seen on these illustrations ‑ opening the front door and supply removal.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Remove the toner cartridge from the imaging unit to separate the two supplies as seen here.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Insert the toner cartridge back to the imaging unit, install back the supplies to the printer and close the front door as seen on these illustrations ‑ reinstalling the imaging unit and closing the front door.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
If the error persists, replace the Imaging Unit (Part number: B220Z00)