I don't remember where I learned this trick or why it works, but it  does work in many instances with some HP printers. Use this technique to reset your printer if it is hung up for any reason, can't automatically "align cartridges" or is just acting goofy.

1. Unplug the power cable from the back of the printer
2. Let the printer sit untouched without the power cable for at least two to three minutes
3. Push and hold the power button
4. Plug in the power while still holding the power button in.
5. Keep holding the power button for at least thirty seconds after you plugged the power cable back in.
6. Release the power button and try using your printer again.

Good luck! 

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