lenovo z470. Trying to connect to tv via hdmi. When I connect, the tv doesn't read anything. I tried dual-monitor mode, where it shows the same thing on both screens, then I tried nothing on my computer but show on the tv, still didn't work but made my computer screen go blank. Now when I connect my computer to hdmi, it goes blank. It seems ridiculous, this should be so easy, I don't know what's going on!
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