Canon LBP7750cdn give " cannot verify " message

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  • dohha
    Technician
    • Aug 2013
    • 12
    #1

    [Error Code] Canon LBP7750cdn give " cannot verify " message

    l have canon lbp7750cdn printer connected to a windows 7 computer by using USB cable,
    every time i try to print , i got "cannot verify" message displayed on the printer's LCD and a red light flashing,
    i tried by using PCL5,PCL6, or UFR print driver. also l tried to connect to anther computer with no change .
    i cannot print even any TEST PAGE from any driver. note l could print Configuration page and Network status print page
    any help will be appreciated , thanks in advance
    Last edited by dohha; 03-10-2018, 03:42 PM.
    Tags: canon, error, lbp7750, message, print driver
    • teckat
      Field Supervisor

      Site Contributor
      10,000+ Posts
      • Jan 2010
      • 16092
      #2
      Re: Canon LBP7750cdn give " cannot verify " message

      Originally posted by dohha
      l have canon lbp7750cdn printer connected to a windows 7 computer by using USB cable,
      every time i try to print , i got "cannot verify" message displayed on the printer's LCD and a red light flashing,
      i tried by using PCL5,PCL6, or UFR print driver. also l tried to connect to anther computer with no change .
      i cannot print even any TEST PAGE from any driver. note l could print Configuration page and Network status print page
      any help will be appreciated , thanks in advance
      Windows 7 & Vista
      To enter in Advanced Options menu in Windows 7 and Vista OS:
      1. Close all programs and reboot your computer.
      2. Press the “F8” key as your computer is booting up, before the appearance of the Windows logo.
      3. When the “Windows Advanced Options Menu” appears on your screen, use your keyboard arrow keys to highlight the “Disable Driver Signature Enforcement” option and then press “ENTER“.


      Attention: Keep in mind that disabling the Driver Signature Enforcement is a security risk, and you must disable it only if you are sure that the driver or program that you want to install and run is trusted and legitimate.
      **Knowledge is time consuming, exhausting and costly for a trained Tech.**

        Comment

        • dohha
          Technician
          • Aug 2013
          • 12
          #3
          Re: Canon LBP7750cdn give " cannot verify " message

          Originally posted by teckat
          Windows 7 & Vista
          To enter in Advanced Options menu in Windows 7 and Vista OS:
          1. Close all programs and rebootF8Windows Advanced Options MenuDisable Driver Signature EnforcementENTER


          Attention: Keep in mind that disabling the Driver Signature Enforcement is a security risk, and you must disable it only if you are sure that the driver or program that you want to install and run is trusted and legitimate.
          thank you for help
          should i reload print driver or reboot my computer after performing previews step?
          thanks again

            Comment

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