What to do if my Lexmark All in One Printer says 'Incorrect paper size, open [paper source] [34]'?
- KKatie SmithAug 25, 2025
If your Lexmark All in One Printer displays an 'Incorrect paper size' message, load the correct size of paper in the paper source. Also, ensure the length and width guides are correctly adjusted. Verify the paper size and type settings in Printing Preferences, the Print dialog, and the Paper menu on the printer control panel. Make sure that the paper size is correctly set. If needed, select 'Continue' to print using a different paper source or cancel the print job.