Question about HP DeskJet 940c InkJet Printer

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COLOR NOT VIVID

I have new ink cartridges in, and the prints were light and had lines through them (color). Black text seems to be ok. I did test page, aligned the print cartridges. did a test of a colored picture and the lines seem to be visible when doing a draft, but better on 'normal'. however, my color on the print is not what the picture has...it's shades lighter. what else is gong on?

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Hi Sounds like the #78 color cartridge you have is faulty.

Possible causes:
If recently bought?
Check the sell by date... Usually Good for 6+ months after date at least. or it may have been in a computer shop window and ink may have thickened?
HP usually give 6 months guarantee on inks once opened if faulty.

Never buy refilled inks if the seals are not perfectly clean and sealed.

When 15+ tiny ink jets are clogged... white lines will appear in prints. Clogged inkjets can easily be unclogged with a print head cleaner like Magic Inkjet Flush (Ebay)

But if you need a quick fix... Try holding print head in escaping steam from a kettle. The ink is thermal in those so it should unclog easily if you have ink? Then place onto paper towel for 1 minute to start ink flow then test.

Empty weight is 95g and each 1g over represents 1ml of unused ink.

Also check 3 tiny screws on top are not clogged... If air cannot replace ink used... it will starve ink flow and light prints may occur. To test... Hold print head onto a paper towel and drip a couple of drops of distilled water onto black screws... if it goes through they are not clogged.
If not hold cartridge upside down in steam for a couple of seconds only.

Clean electrical contacts:
Use cotton wool and alcohol and clean electrical contacts on back of cartridge and where they make contact inside printer.

Then install print head and inks and test.

TIP
NEVER PUT TAPE ON PRINT HEAD !
Otherwise colours will contaminate.

Good Luck !

Posted on May 10, 2008

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The DeskJet 940c is not really the highest quality printer out there on the market. However, having said that, the printer is still capable of producing decent quality printouts. You might play with your printer settings for print intensity, lightness, ink volume.

Posted on May 10, 2008

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Posted on Jan 02, 2017

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