Re: HP Deskjet 3550: paper jam error won't go away
Probably a tiny shred pf paper still in there. The newer printers are very sensitive to anything not being perfect. You probably will have to take it apart and blow it out with compressed air. Otherwise one of the sensors that detect the jams is bad.
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If your equation requires either a complex combination of variables to get the desired result OR you can't seem to get the result regardless of the variables....it ain't your variables, it's your constant.