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I have a HP C4780 and was working fine a few moments ago -

Customer Question
I have a HP...

I have a HP C4780 and was working fine a few moments ago - then all at once ,,, stop printing, The printer display window states "print cartridge not detected." I have unplugged, turn off, and even put in a new cartridge. My cartridges are factory fresh .... not refills. Please advise.

Technician's Assistant: Is this the first time you've had to change the ink for your C4780?

The last time changed was about 6 months ago. I use 60XL and print Black only.

Technician's Assistant: Are you getting any error messages? Are you able to open the lid that covers the cartridges on your printer?

No error messages and lid opens feely.

Technician's Assistant: Anything else you want the Printer Expert to know before I connect you?

No except have a Good Night & thank you.

Submitted: 7 months ago.Category: Printers
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Answered in 9 minutes by:
1/16/2018
Technician: Nathan, Engineer replied 7 months ago
Nathan
Nathan, Engineer
Category: Printers
Satisfied Customers: 31,434
Experience: Computer networking/repair. 12+ years experience.
Verified

Hi, I'm Nathan.
Sorry to hear that you're having trouble, but I'll do my best to help you. Please give me a few moments to review your details here.

There are a few possible causes of this issue, including a bad cartridge, internal debris/contamination, or a hardware failure (bad printhead, bad logic board, faulty sensor, etc).

What we can try are some cleaning and reset steps.
First remove all of the ink cartridges, then clean the metal electrical contacts on the back, as well as where they mate up inside the printer, using qtips and rubbing alcohol. Dry well, then reseat the cartridges. Then reset the machine: unplug power at the wall outlet wait 5 minutes press and hold the power/on button for 60+ seconds keep holding while plugging back in, and for another 60 seconds after, then release

Let me know the results, and I'll advise further if needed.
Nathan

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