WebOct 8, 2007 · The hot plug detect channel, which uses one pin, senses when you plug in or unplug a device, re-initializing the HDMI link if necessary. The one-pin display data channel (DDC) carries device information and the HDCP encryption information discussed in the previous section. WebJan 4, 2024 · 1 Press the power button on the connected device. Verify that the connected device is actually powered on. If it doesn't turn on, then you need to contact the manufacturer of your external device. Note: Newer TVs will automatically detect a device once it is connected via HDMI.
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Troubleshoot connecting Surface to an external display
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