Introduction
The scroll wheels are on the top left and right side of the iHome. The right side scroll wheel control the "set +/-" and the left side scroll wheel controls the "volume". If they do not respond, the circuit board could be corroded or broken.
Tools
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            Locate all screws on the back of the iHome. Each screw can be located by the arrows on the iHome. 
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            Two Countersunk 9.7 mm Phillips #2 screws in the middle. 
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            Two 15.9 mm Phillips #2 screws. 
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            Six 13.9 mm Phillips #2 screws. 
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            Some screws are located under the black sticky pads. Gently remove the black sticky pads and it will expose the screws. 
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            Two 11.8 mm Phillips #2 screws. 
 
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            Slowly tilt the bottom cover of the iHome up. 
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            Disconnect the wire just by pulling on the connector gently. 
 
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            Disconnect the final connector pin series and carefully set your lid behind the body of the iHome. 
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            The tiny speaker will not be disconnected for this repair, but you can easily remove it from the lid by means of a paperclip from the outside. While not necessary, this can help prevent damage to your device. 
 
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            Remove the seven screws that are holding the motherboard in place: 
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            Six 14 mm Phillips #2 screws. 
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            One 14 mm Phillips #2 screw with two rubber washers on it. 
 
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            Carefully tilt the motherboard up from the front. 
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            Disconnect the 8 connections by gently pulling on them. Starting from the front and work your way backwards. 
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            All 8 connectors disconnected. 
 
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            Unscrew the screws holding the speakers onto the body. One on each side: 
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            Two 14.3 mm Phillips #2 screws. 
 
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            To remove the speakers from the iHome, gently lift up the back of the speaker and pull towards you. These are very secure so minor shaking may help release the speaker. 
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            Repeat for the other side. 
 
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            Remove the three 7.9 mm Phillips #2 screws holding the scroll wheel board down. 
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            Repeat for the other side. 
 
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            With the screws removed, gently pull the scroll wheel circuit board up. 
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            Repeat for the other scroll wheel circuit board. 
 
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            The connector to the scroll wheel has already been disconnected from the motherboard. 
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            Untangling the wires might be necessary to completely remove it. 
 
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To reassemble your device, follow these instructions in reverse order.