Question about HP LaserJet 2840 Printer
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It's a problem with the scanner unable to "see" its home sensor. The home sensor is a black & white film strip stuck onto the flatbed glass, just above where the scanner head homes. The printer needs to "see" the two little black 1mm square bumps in the white area. When the scanner head "homes", as it just disappears under the plastic it should move left and right as it looks at the home strip. If it keeps going and chatters at the right-stop it didn't see the home strip. Clean under the glass unplug all of the wires and get a can of air spray and spray the leads and the adf plug in too.
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Posted on Mar 26, 2011
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Posted on Jan 02, 2017
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