Introduction
When it comes to electronics, the power supply can eventually fail over time. This guide will show how to replace an old or damaged Apple TV power supply.
Tools
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            As the Apple TV doesn’t have any visible screws or point of entry, the first step is to use a couple of metal spudgers to carefully loosen and remove the rubber base from the upper case. 
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            Upon opening the Apple TV, the most noticeable and largest parts will be the heat sink and power supply. 
 
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            Using a #1 Phillips screwdriver, remove the screws holding the heat sink in place. 
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            Next, use a metal spudger to gently pry the logic board up and out of the device. This will allow easier access to the power supply. 
 
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            The power supply is attached at three different points: the logic board/power supply connector, two screws and a heavy piece of tape, located underneath the power supply. 
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            Locate the connector attaching the power supply to the logic board. Using a pair of tweezers, gently remove the connector from the power supply. 
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            Using a #1 Phillips screwdriver, remove the two screws located toward the front of the device. 
 
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            Using a nylon spudger around the edge, gently work the power supply up and out of the case. 
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            Place the replacement power supply in the now empty spot. 
 
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To reassemble your device, follow these instructions in reverse order.
2 comments
There is actually no need to take out the heat sink, just open the bottom, unscrew the power connector, unplug the 8-pin connector from power supply and the power supply is free.
My power supply of apple tv 2nd gen is damaged, it is not available?
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