Question about HP PSC 750 All-In-One InkJet Printer

3 Answers

Problem with scanner and printer

The message in the window is "Scanner failure
Turn power off and then on again"
I can print if directed off the computer, but not if I want to print something from the machine itself (on the glass).

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  • Anonymous Nov 15, 2008

    Frequently it will not make copies but will print with no problems. It seems to only copy when it is first turned on and cool.

  • Anonymous Nov 29, 2008

    The message in the window is "Scanner failure
    Turn power off and then on again"
    I can print if directed off the computer, but not scanning

  • agreaves Jan 21, 2009

    My psc flashes with scanner failure turn power off then on again. Tried it it is not working, Tried taking top off cleaning mirrors and glass still not working. Please Help:

  • Anonymous Jan 29, 2009

    I have the same 'Scanner failure' error. It says to turn power off then on again.

    It will NOT scan, nor will it copy. But I can print to it all day, and that works fine.

    I will try the other guy's suggested solution by ss0304 and hope that fixes my problem...? I too, was about to go buy another scanner/printer unit.

  • Mike Estep Jan 30, 2009

    I also took the unit apart, and cleaned the mirrors. There did appear to be red ink on one end of the mirror. But after cleaning all mirrors, the scanner is still behaving the exact same way. It won't copy or scan. If anyone else has another solution, I would love to hear it. My unit still prints fine. It just won't scan...?

  • Mike Estep Jan 30, 2009

    FYI, the small screws on the back of the PSC750 seem to be a small international size allen wrench. I almost stripped the first one, when trying to use a small screwdriver head. Then I tried a small allen wrench, and realized that it was slightly off... so after trying an international set, it fit just right, and I was able to remove the screws. Cleaning the mirrors didn't help my scanning problem, but at least it was something to try. Good luck to others.

  • Anonymous Feb 19, 2009

    not copying and scaning

  • Smthng2Do Mar 02, 2009

    Same problem here with the scanner error, but I also have problems with the black ink. It says incorrect ink cartidge installed. I bought a double pack of #15 ink, and neither of them worked. Same error. I can put the old cartridge back in without getting the error prompt however. I took the entire unit apart from top to bottom. It was absolutely caked in the inkbay where the cartidges rest when in the park position. I was certain that cleaning it was going to fix it. To my dismay it solved nothing. I have looks at hundreds of posts, contacted HP support & have found zero resolutions & this error appears all over the internet on forums and DIY sites. If anyone anywhere can be of help, please post! I'm in dire straights!


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I had the same problem and someone on this site provided a solution and so far it works! I've trawled and tried everything and was about to give up and go any buy a new printer/scanner and throw this one away - but no need. It's a good printer, but finally have a solution.

1. lift up the scanner lid and then remove it from the hinges (pull towards you and it should easily come off)
2. in the back of the printer, there are 2 small screws. Remove them. I used a very small headed flat screwdriver. Keep an eye on them as they will fall out and you don't want to lose them.
3. OK - now a little bit of gentle muscle and pryinbg is required. What we need to do now is to remove all of the grey cover. Stand back and see all the grey cover? It's one piece and we need to remove it. The back will come off as the screws are removed. Try and pry the front of by pushing and pulling. Use a bit of strength to get it off but read step 4 quickly!
4. The cover is connected to a white ribbon - don't remove it. You will need to set the the cover to the right but make sure where you set the cover is at the same height of the printer or the ribbon will come out. Put some books or other things to the side of the right side of the printer and when the cover is off just move the cover to the stack of books.
5. on the right side, you will see a black cover. It's hard plastic and has 2 big squares and 2 small rectangles. You need to remove this. either use a small screw driver to pry it or use your fingers.
6. You'll see the mirrors exposed. Clean them with Qtips. Clean the glass as well as it's off. Keep the black cover somewhere safe but not in the printer.
7. put the glass cover / grey cover back on from FRONT to back.
8. Put the screws back in.

Hope this helps. Again, someone else had the solution and I can't seem to find the page where he put it as I wanted to say "thanks". Hopefully whoever has the similar problem can solve it with this.

Good luck!

Posted on Jan 04, 2009

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My hp psc 750 printer show error,

Posted on Nov 15, 2008

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You need to change the pcb inside the scanner itself.... ....but this is hard to get you will probably need to replace the whole scanner unit

Posted on Nov 10, 2008

  • Asish Sharma
    Asish Sharma Nov 10, 2008

    oops sorry..i guess i didn't read in between the lines.....does the printer show as online??? in windows....


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