When I plug in my laptop to my Technika tv via hdmi it always plays sound through the laptop speakers instead of the tv speakers. In the sound settings it says that none of the hdmi devices are plugged in but it is. I have tried turning off the tv, unplugging then plugging back in but the only thing that sorts the problem is reinstalling the realtek hd audio driver each time i want to play something through the tv. It's a custom build laptop. It was working fine a couple weeks ago, I havent installed any new software or updates and ive done a rollback. Ive just got no idea what else to do or what the problem is.