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If the error is still there, then there's something in the machine still you aren't seeing.Unplug it completely from all cablesLift it up, turn it upside down and shake it a bit to see if anything comes loose.Check the rear access and front access using a flashlight to look for any tiny paper scraps or anything else that could be hard to see.Try forcing a very thick piece of paper into the rollers to see if it dislodges anything.Finally try using a dampened lint free cloth to clean the rollers in the printer.See if that works...
i tried them and the thick paper runs right thru but the red light still flashes
Are you sure it's the paper jam light?
Could be a printhead or carriage issue