Lexmark MX721
After installing the Lexmark N8372 wireless option, an 'Unsupported USB hub, please remove' error is posted on the display panel.
Please contact Lexmark Technical Support for assistance.
LEGACY ID: SO8977
The printer displays any of these error codes on the control panel: 43.40P, 43.40Q, 43.40R, 43.40S, 43.40T, 43.40U, 43.40V, 43.40W, 43.40X, 43.40Y or 43.40Z
650.84 error message on the Lexmark MS72x, MS82x, MX72x and MX82x printer models.