I was streaming a show on the second screen using the onboard graphics and had just closed a game on my main screen using the dedicated graphics. The whole system froze up then both displays quit and it sounded like morse code was coming from the TV speakers. After powering the system down and restarting the onboard graphics would not register anymore. Tried resetting, cutting all power, resetting CMOS , forcing the iGPU rather than leaving it on auto etc and nothing seems to work .