Sixth iteration of Apple iPhone, announced on September 12, 2012. Repair of this device is similar to the previous models, requiring screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, or 64 GB / Black or White.

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How do you if the u3 needs to be changed?

How do you if the u3 needs to be changed? I swapped my battery and everything works except for the home button??? Could it the flex cable?

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U3 sits on six pads. It is *usually* forced completely off all six pads during common iPhone 5 battery replacement pry damage. This will result in the loss of function of BOTH the power and home buttons.

However, in some cases only the front pads facing the battery--1 and 6 are damaged from the prying. This will cause you to lose home button function only.

Alternatively, U3 can be fine, but you've damaged the adjacent R20 which is required for home button function.

In any event, you can rule out the flex cable by just shorting together the two gold prongs that make contact with the bottom of the home flex. If that triggers normal home button function, then replace your home flex.

If you've recently changed your battery though, I will be surprised if it it NOT U3. Very common mistake.


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