HP Designjet 4500 Series - User Guide

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)