I had the same problem, stuck in a hotel room for 2 days. When I held down the button, next time I turned it on, I got the same prompt with using HDMI output, said yes, and screen went black. However, a screen then came up asking if I could see the image or not, but it has a 30 second time limit before it saves those setting, you have to click "No" on this screen, and it will drop the resolution to 780p instead of 1080 and it should work! Make sure you're paying attention so you don't miss the screen!
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