Hdmi is auto detecting and shouldn't need to be turned on. try plugging your hdmi1 device into the hdmi2 slot. if switching devices around doesn't get hdmi2 working, that jack is likely broken. all the hdmi ports go into the 1 main board inside, and a lot of times you would have to replace that board to fix. if only 1 jack now works, you could also get an hdmi switcher, and then plug all your devices into that, and then just plug the switcher into the working jack. let me know if I you require further assistance.
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