1.Check if the paper size settings on your computer and printer are correct
2.Check if the correct settings are selected in the programming software or driver on your computer
3.Run a self-test on your printer
4.Check if your document is set to print in the desired orientation
5.Check if your print head is clean
6.Check if the print head is aligned properly
7.Check if the toner cartridge or ink cartridge is correctly inserted and not nearly empty
8.Check if the paper guides are adjusted properly