Hi, I own an HP OfficeJet 250 Mobile All-in-One series printer. I am getting an error message C4EB8000 when I turned on the printer today. There are no print jobs in the queue. After the error message appears briefly on the printer's screen, then I get a message to turn the printer off, then on again. However, when I hold down the on/off switch, the printer appears to turn off, but then the symbols on the printer's screen light up, even though I am still holding down the on/off switch. When I release the on/off switch, the printer then turns itself on again, and the error message reappears. I can't completely turn off the printer.
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