Lexmark MS310
‑ On
If the light sequence matches the light sequence in the preceding illustration, then try one or more of the following:
Note: If no paper is loaded in the feeder, then the printer manually overrides the request and prints from an automatically selected tray.
Lexmark MX/MXxxx, MB/B2xxx, and XM/Mxxxx: Unable to Load Paper into the Multipurpose Feeder (MPF)
No pick or ‘Load Tray 1 with specified paper’ message appears even when the tray has paper in it? See this article on how to troubleshoot.