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Common problems HP Solution Center not working : Adobe Flash Player Error and Unable to scan
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Black edges when using flatbed scanner (Officejet 7740)

HP Recommended
Hp Officejet Pro 7740
macOS 10.15 Catalina

Hi, I have just purchased an Hp Officejet Pro 7740 printer, It appears to be fully functional but I have a problem with the flatbed scanner. No matter what size of document I scan I am always left with artificial black edges, See photo (Blank A4 sheet).

This happens when using the official HP smart program or my Mac's built in software.


At first I thought it may be faulty but after further testing I think it may be a software / settings problem.

I say this as if I use the ADF / copy function / or even the HP smart app on my iPhone none produce the same issue.

It is only when using the flatbed to scan with one of the previously mentioned programs.


Scanning via my mobile to then send to my computer is obviously not a long term solution when it should work via the computer. Has anyone else had this issue or have any ideas how to fix it?


Many Thanks




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Welcome to the HP support community.


Clean the scanner glass and underside of the scanner lid with a soft, lint-free cloth sprayed with glass cleaner.

  1. Turn the printer off, then disconnect the power cord.

  2. Lift the scanner lid.

  3. Spray a soft, lint-free cloth with glass cleaner, then wipe the scanner glass, glass strip (if present), the white backing under the scanner lid, and the white strip under the lid (if present) until clean, dry, and streak-free.


    To protect the interior printer parts, do not spray the cleaner directly on the glass or on the underside of the lid.

    Figure : Clean the scanner glass and under the lid, and any glass or white strips (if present)


      Clean the scanner glass and  under the lid, and any glass or white strips

      White scanner lid backing
    2. White ADF scanner lid strip (if present)

    3. Glass ADF scanner strip (if present)

    4. Main scanner glass

  4. Reconnect the power cord, turn on the printer, then close the scanner lid completely.

  5. Load the original document or photo, then try to scan. Make sure the original document or photo is in good condition and free of tears, creases, folds, staples, or tape.

Update the printer firmware

Here are the steps:- Click here


Refer this HP document for more assistance:- Click here


Let me know how it goes.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.


I am an HP Employee

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