Lexmark CX517
Try one or more of the following:
Note: If the printer detects a tray or feeder that has the correct size and type of paper, then it feeds from that tray or feeder. If the printer cannot detect a tray or feeder that has the correct size and type of paper, then it prints from the default paper source.
Here are steps to troubleshoot when a 'Tray 1 Empty, Load Tray 1 with Paper' error continually appears on a Lexmark CS310, CS410, CS510, CX310, CX410, or CX510.