One of the HDMI ports faces toward the back, rather than the side like the other two ports. I wouldn't say it is unusable, but a connection to it can be awkward if you're wall-mounting. Plugging in the cable before you attach the TV to the mount might help. You can see all three HDMI ports in the attached photo. The third port is between the side-facing ports two and the composite connectors, just above the optical input.
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