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Not sure if it will power a Amazon Fire stick, but I am using the USB port to power a SPDIF to RCA left/right converter for some small computer speakers so I would imagine it would power a Amazon Fire stick. The converter I bought is very similar to this Insignia one, except it has a USB cable as the power cable that plugs into the back of TV. Hope this helps.
I would recommend:
Sorry, there was a problem. Please try again later.Go to LG website. Call their Tech Support. Give them the model number. And ask the question. Their tech support was really helpful and saved me 75 dollars and kept me from having to buy an optical audio cable to have the sound go down the HDMI cable to my surround sound system when using the TV apps to plan Amazon Prime
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