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I've been having an issue where my 4100 constantly jams. When it begins to print or load paper there is a large knocking sound which is the gear in the printer that grabs on to the end of the paper spool holder, it's having a hard time holding it in ...

Hello,I've had a pro-4100 for 9 months and a few weeks ago I started to notice lines that run vertically along my prints, from the front edge back about 4" towards the printer (so perpendicular to the printheads). After running multiple tests, I've d...