DEREK WELLINGS

asked Jan 15, 2012 at 4:43am
Hp HP DeskJet 600

HP DESKJET 600. PRINTING PROBLEM

My HP 600 DESKJET prints but,lines and dots are missing.I've printed the `self test pattern', this is legible but, of poor quality. When I print a document this is far worse, and hardly legible. I have cleaned the copper contacts on the cartridge, and the print cartridge cradle and replaced the cartridge although the original cartridge (original HP) is still half full with ink, and appears to be in good condition. I still have the original HP User's Guide but, there's little in there, other than instructions on cleaning the contacts,as above! Can anyone advise further?