HP Designjet 4500 Printer series - Manual (Page 227)

● Check that your printer's firmware is up to date. See Update my printer's firmware.
● Check that you have the right settings in your software application.
● If you are seeing a problem only at the top of the page, see A defect near the start of a print.
ENWW If I still have a problem 213
How do I... (Image
Diagnostics Print topics)