Question about HP OfficeJet G55 All-In-One InkJet Printer

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Scanner failiure on HP Officejet g55

My All-in-One works fine as a printer - documents sent from the computer print out. But when I go to make copies, I get an error message that says "Scanner Failure." The solution to power down and up no longer works (it did at one time). I have not upgraded any software or made other changes from when it was working. Can't I just replace a part instead of buying a new machine, like HP wants me to do when I contact customer support?

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  • Anonymous Feb 13, 2008


  • Anonymous Feb 22, 2008

    What a piece of crap. I too have the same problem "scanner failure". I unistall and reinstall the CD and it works for a little while, but soon after the same thing

  • Anonymous Mar 14, 2008

    My Hewlett Packard OfficeJet G55 works fine if I print from the computer, but when I try to make a copy I get a "SCANNER FAILURE" message and I am instructed to turn the printer off and on. This does nothing but cause agravation. Dose anyone have a solution?

  • Anonymous Jun 06, 2008

    I have the same problem since I went to windows xp.

  • Anonymous Feb 11, 2009

    please hellp me for scaner failere hp g55 can you send the solve in my maile addres please [email protected]

  • Anonymous Mar 09, 2009

    My HP G55 works fine as a printer, but when I try to scan or copy, the scanner makes the initial pass, and then right after completing the return pass, I get a "scanner fault" error message. I am then instructed to shut down the printer and re-start it, which does not fix the problem. The bulb is working fine. When I copy something it will make one copy and print it before the error message appears. When I try to scan something, the image initially appears on my screen but then the scanner fault error message appears and locks everything up. Upon completing the return pass, the scanner sounds like it has either gone past a physical "stop" of some kind, or that a gear is jumping a cog. No such problem or noise happens when I use it strictly as a printer.

  • Anonymous May 18, 2009

    thanks Tosty, it worked perfect!! and only takes me 15 mins to fix this trouble

    Xplody from Argentina

  • roger_witdou
    roger_witdou Mar 26, 2017

    Bedankt Tosty, je bent de max!



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I had this same problem and finally found the solution. The first thing you have to do is dismantle the top portion of the printer to gain access to the part you need to fix. Here is a link to an HP website with photos showing you how to do this.

Once you have it dismantled, look toward the back of the unit, near the belt that moves the light bar back and forth and you will find a small, clear disc (about an inch in diameter) that is attached to the end of the shaft of a small motor. It almost looks like a tiny disc brake and caliper. I didn't have to replace any parts; all I had to do was clean that clear disc with a q-tip that was slightly dampened with plain water. You have to be very careful when cleaning it because the disc is very thin and fragile. Don't remove the disc, just clean it in place. I also used a small can of compressed air to carefully blow off any dust particles after I finished cleaning it. If you look at the disc with a magnifying glass, you will see that its outer edge is filled with very tiny index lines. From a distance, they almost look like a grey circle around the edge of the disc. Apparently, those tiny lines and the miniature caliper count the rotations of the motor as it spins, and this tells the printer where to stop the light bar after it has scanned or copied something. When it gets dirty with dust or cigarette smoke, it can't count properly, so the scanner just makes a grinding noise after a scan because it doesn't know where to stop, and you get the "Scanner Failure" error message. I carefully cleaned that disc, re-assembled the unit, and it works like new again. I hope this helps!


Posted on Apr 22, 2009

  • bonyon Jul 16, 2011

    Just tried this suggestion on my HP G55---it really works!!! Scan and copier back in business. Thanks so much.

    Brenda in KY


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If the light doesn't come on, you may be able to solder a new one in - total cost $15.

Posted on Sep 19, 2008


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