Canon PIXMA MP780 All-In-One InkJet Printer "fix black line across printed" Questions

...across the printed coloured page. Printing in black ink OK.. Thanks Jim Checked ink cartridge's, two had dried out, still had ink in them but the exit apertures were blocked. So new set of ink ...

...described it beautifully. What do we do? problem is when the printer does a head clean dumps large amount of black ink on to rollers. Replacement head is almost £100 and not certain to fix ...

...black lines (about 1/4' apart) across the entire picture. They are fine lines, but very visible and ruin the otherwise good quality of the print. No problem printing text. What kind of problem do I ...

across the width in front of and below the drive belt. This is part of the optical encoder that tells the print-head where it is. If you look closely, there are fine black vertical lines on this strip

across the width in front of and below the drive belt. This is part of the optical encoder that tells the print-head where it is. If you look closely, there are fine black vertical lines on this strip

...line) -Black & White COPIES from the same ADF are perfect (no line) -All other copying, scanning, printing is fine (no line). -Horizontal line is only on outgoing black & white faxes and only when ...

...black switch rocks back & forth but won't stay up. I bet a hand grenade would "fix" it!! I give up! Steve Smash it - i just did and i feel so much better  - what a piece of **** I used the ...

...black line across the pages. I have changed the drum and the cartridge and even tried cleaning mode. Please help!!! I have a HP Laser Jet 2840 All in One Every print job, copy, and fax have the solid ...

...black lines across page customer was using generic toner. replaced Developer tank this fixed the problem for aboiut 2 weeks now black lines are starting to appear again Check if you have not reached ...

...black line printing down the middle of the page that smears when you rub across it. The toner apparently is not fused to the page but what is causing it and how do I fix it? U didnt write what model ...