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Bearing replacement on HP LaserJet II to fix error code 41

(From: Andreas Mohr (a.mohr@mailto.de).)

My (donated) Laserjet II series printed black horizontal lines after about the third sheet. It then occasionally spit out "error 41".


The ball bearings of the scanner unit were defective (now I know that my printer was MUCH louder than other HP 2s). That caused the scanner unit to get "out of sync" and print black lines and occasionally spit out "error 41".

I just replaced the ball bearings and everything was fine again.

As far as I know, no Laserjet error codes service page mentions this yet. (They only say that "the scanner unit may be defective", but not HOW that may be.)