SOURCE: everything I scan has two vertical lines and lots of horizontal
OK Im warning you before hand this is an old out of warranty printer for hp and there may be some hardware malfunction so i would request you to call hp at 18004746836 and simply ask for an upgrade but heres something that you can try for troubleshooting(copy and paste this link in the address bar of your web browser):
Number 1 troubleshooting Link
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00307511&cc=us&lc=en&dlc=en&product=428800
Number 2 troubleshooting Link
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00308545&jumpid=ot_recdoc/c00307511/en_us/c00308545/loc:1&custom_solutionid=rd_c00307511&lc=en&dlc=en&cc=us&product=428800
Lastly I hope your not using refilled cartridges cauz that causes the malfunctioning of the hardware of the printer
SOURCE: I have a HP Officejet
Hello
To keep the printer such a time time, dried ink cartridges, if it has ink, then put the cartridges into warm water and put them back after dry. otherwise you need to replace cartridges.
Refill is also an option.
Good Luck
SOURCE: printer printing horizontal blue lines
Program malfunction, uninstall HP Printer programe and reinstall your version for the printer from www.hp.com remember to load the complete program.
SOURCE: HP L7780 is printing with horizontal white lines
Hi
Try to clean it manually by rubbing the print head into a plain paper with rubbing alcohol until ink flows. After that wipe the print head by soft cloth with rubbing alcohol. The run the print nozzle for 2-3 times.
If not, dip thr print head into a hot water and then run the print nozzle for 2-3 times.
The problem it that the print head clogged or had sticky ink into the print head.
I hope it helps you.
If you need more help come back.Post /
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