K8600 Printer Cartridge Failure: Printhead or Sensor??

I have an Officejet Pro K8600 that ejects the print cartridge, cartridge light flashes, when I print. The supply levels say 80-100%. This happens even with a new cartridge. The diagnostics say the printheads are "good." I cleaned the print heads three times. All printing (when it does print) is clean and crisp, with no lines. HP support says I need to replace the printheads (yes, they are expired, but print quality is excellent). Office Depot rep says the print sensors are bad and motherboard needs to be replaced (actually says printer needs to be replaced, as it's not worth fixing). I love the printer (when it's not acting up) and speed and print quality is great. I don't want to pay $150 for two new printheads if this is not the problem. So, if print quality is fine, and cartridges are being ejected automatically in the middle of printing, is this a printhead problem or sensor problem? Thanks for any insights you might have on this....not ready to buy a printer for one that is only 2 years old.

Hi there,
This can usually be resolved by cleaning the printhead thuroughly. Check this article out which may help.
Best of Luck!
You can say thanks by clicking the Kudos Star in my post. If my post resolves your problem, please mark it as Accepted Solution so others can benefit too.

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    Bob Headrick,  HP Expert
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    I am not an employee of HP, I am a volunteer posting here on my own time.
    If your problem is solved please click the "Accept as Solution" button ------------V
    If my answer was helpful please click the "Thumbs Up" to say "Thank You"--V

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    I work on behalf of HP
    Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
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    I am not an employee of HP, I am a volunteer posting here on my own time.
    If your problem is solved please click the "Accept as Solution" button ------------V
    If my answer was helpful please click the "Thumbs Up" to say "Thank You"--V

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