3 Replies Latest reply on Aug 2, 2015 6:25 AM by seedy

    Win10 HDMI No Output, Monitors Not Detected


      Upgrade Win8.1 to Win10 64bit


      Intel i5-470UM

      AMD Mobility Radeon HD 5450

      Switchable Graphics


      After update Windows installed Driver 15.7 (7/15/15)

      All seems good but HDMI is not recognized


      I tried update 15.7.1 (7/29/15)

      Flashing Blue Screen boot loop at logon


      Boot into safemode uninstall drivers restart


      Install leshcat after following all instructions and cleaning


      Same Flashing Screen / Remove All Drivers and Clean / Let windows reinstall


      HDMI Not Recognized


      I have now Rolled Back to Win8.1 as I need my calibrated monitor for graphic design


      Just wanted to know if anyone else has had these problems and to have a place to comeback to when they are resolved before updating again to Win10.


      Thanks for all help and insights.

        • Re: Win10 HDMI No Output, Monitors Not Detected

          Yes, I've had problems with HDMI too. I get a blue screen and VIDEO_TDR_FAILURE error. I suspect the 15.7.1 drivers are not HDCP compliant.

          • Re: Win10 HDMI No Output, Monitors Not Detected

            I ended up switching back to the previous drivers that worked in win8.1.


            I used this tool from microsoft KB3073930 to block the driver updates


            I uninstalled both amd and intel drivers (with vga attached) in Device Manager


            Installed Previous Intel Driver


            Extracted Previous AMD Driver


            Right Click 'Scan for Changes' which brought up the 'Microsoft General Display Driver' (or similar title)


            Right Click 'Update Driver' and chose the extracted AMD folder


            HDMI Now Working.

            • Re: Win10 HDMI No Output, Monitors Not Detected

              Try this:

              1 - Open Device Manager. Right click in the Start Menu Button (The windows logo in the bottom left of the screen, YES you can right click it in Windows 10), and select Device manager.

              2 - Find the Graphics Drivers

              3 - Right click in the Graphic Driver (If your laptop has an integrated card you have to right click that one) and select Update driver

              4 - Select the bottom option, for Search drivers in your PC

              5 - Select the bottom option again, for Search from a list

              6 - Select a different version from the one you already have. If you have an integrated card, you need to select the older versions.

              7 - Click Next, wait for it to update the drivers, the sceen will flicker for a while.

              8 - Restart your PC, if it doesnt help, please post a picture of how the Device Manager window looks in your PC so we can see what you have in the laptop.

              Good luck


              For some reason this happened in my laptop, where Windows installed the drivers from the discrete card into the integrated card (main card). Then I had no options to set screen resolutions or connect other screens via HDMI or VGA. After changing the driver from the integrated card to a lower version (which windows provided via Windows Update) everything works fine, connecting screens and all.