Only sticks that plug directly into a TV are eligible for an extender. It's nothing more than a short HDMI cable and you're already using a much longer HDMI cable. Is the model number 3920? I took my 3920 out of its case a couple of years ago and while it's not something everyone would want to do, I've managed to get a few more years out of it since I was going to smash it with a hammer. 🙂
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