The 4k quality on my 4k Fire TV Stick stopped a few weeks ago. None of my many other power supplies in the house will solve the problem. I ordered THIS power supply because the CABLE is actually connected internally to the power supply. You just connect it to a 4k Fire TV Stick or other separate device. 4K QUALITY RESTORED IMMEDIATELY! I'm sure the reason this works better isn't just because of the high quality of the power supply.
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