Question about HP Officejet Pro L7780 All-In-One InkJet Printer
When i print a page on the 7780 the black color doesn't print completely, it skips between lines. can this be a printhead problem. I've got the same issue. Have done all the cleaning, calibrations, etc. Even tried a new replacement printhead. The test page prints everything fine except the black which seems to have a streak in the middle of the black color block printout. HP Online Tech support walked me through several steps to change the print driver quality to Best instead of Standard Quality. This works fine for printing from stuff like MS Word & Excel, but doesn't alleviate the streak problems with incoming faxes where you can't change the print quality. Is there something else besides the printhead that can be adjusted? It seems like the electronics on the ribbon connector aren't telling the printhead to eject ink on a part of the black jets. My Dell Photo AIO Printer 924 is printing random lines throught the documents im printing. I have cleaned it oout and printed alignments pages, but it still dosent work.
Always try replacing the ink cartridges first.
It sounds like the print heads in the 7780 are bad. Don't confuse the ink cartridges with print heads. The cartridges fit inside the print heads. You will need to change the heads. Here is a link to HP's how-to.
Could have the same problem with the Dell.
Posted on Jun 01, 2009
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Posted on Jan 02, 2017
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