After you run the nozzle check as recommended above, run the automatic head alignment procedure (which you should have done when setting up your printer initially) and see what happens. In high quality mode, my iP3000 has NO banding whatsoever.
. Also make sure you have the latest driver installed (1.80a for 2k/XP) - it does make a difference plus it has the option of doing a manual head alignment which the original version lacked. Disconnect Printer, Uninstall the original drivers - reboot and install the new drivers per the initial setup instructions. Then redo the nozzle check and head alignment.
. I just ran a plain paper test in standard mode and I don't get any banding there either... And depending on the paper some manual tweking of the settings (instead of Auto, use manual color settings where you can choose the type of printing you're doing like graphics or photos). Using non-Canon papers almost insures you will need to do a little tweaking. Kodak has recommended settings for its papers for the i860 which is much like the iP4000.
.bh.
:moon.