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I tried what you suggested but the video/audio signal still did not come through to the TV. Getting a little frustrated at this point, I removed all the resistors and LEDs from the circuit leaving only a wire going from each "enable" pin to its' own switch that connects to ground. This seems to work ...

I am attempting to build Ben's solid-state AV switcher and I am questioning my schematic. The LED's light when I flip the switch but there is no video or audio. If I connect a wire from ground directly to any of the "enable" pins, the video and audio comes through and all is fine. Can someone ...