That does nothing. Let me restate the problem: the printer is printing a thick black line, over and over again on multiple sheets of paper until the paper runs out. I can hit the cancel button to stop it, but in a minute or two it just starts again. It's as if a printer job is stuck in the queue, but this job doesn't appear when I bring the queue up on the computer. Is it on the printer's internal queue? Maybe. I know this does not happen if the computer is turned off and only the printer is turned on (the computer is an HP as well).
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