Question about HP PS C4780 All in One InkJet Printer

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I'm having an issue with my printer (HP PS C4780), when printing in black the print is barely visible and very streaky. I've tried resetting the printer, replacing the cartridges, cleaning the heads (both through the provided software as well as manually with rubbing alcohol on the print head) and checking all of the print settings with no luck. Any help would be greatly appreciated.

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  • 125 Answers

Did you replace the cartridge with brand new one? or refilled one?

I'm assuming that your cartridge head may be clogged by ink.....

If you have a refill tool, you can do some stuctioning job....if you don't have one..

Pure some water in paper cup (prefre warm watter) and then leave your cartridge for 20 min to resolve the clogging probelm

And take out your cartridge from water.... and wipe out the head.... and put them back to printer.

If you would like to save money, try refill kit by "ROADINK".
Not only they are easy, but also the printing quality is good.
For your better understanding pls check out my youtube video.
And will see how easy ink refill can be done.

http://www.youtube.com/watch?v=tZlkJ-YDsZA

Posted on May 27, 2011

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Posted on Jan 02, 2017

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Hi Good day!! Try to clean your print head, go to printer and faxes and then right click your installed printer and then properties go to Maintenance menu and then click on Head Cleaning and Alignment.

Thank you for using FixYa

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