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Repair information and guides for the fifth generation of iPhone. Model: A1387

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iPhone 4S shows red battery and will not charge after changing battery

I changed my iphone 4S battery with an ifixit battery. The repair went fine. I was letting the battery drain until 10% as instructed. When I went to charge the iphone, the battery does not appear to be charging and all I get now is the red battery symbol with the plug that flashes 2 times and then goes black. The only way I get this screen is when I try to do a hard reset and hold it for 10 seconds. I have looked at the port for lint, but none there. Changed to a brand new cord, still the same. Tried plugging into the computer and it is not recognized and still does not come on. I have tried other cubes and plugged into the wall and still nothing. I do not know what else it could be. I could change out the port, but I do not want to just keep throwing money at this phone. Others have said it could be a bad battery. Any suggestions would be greatly appreciated. God Bless You!

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What was wrong with the original battery?

If it was showing a low battery logo with a iPhone 4 charging cable showing up on the bottom of the screen then you have a bad charging port.

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The original battery nothing worked just black. With the new ifixit battery in the iphone, it has a charge, about 50% and I used the iphone until it got down to 10% as the instructions said to do. When I plugged the iphone into the cord, I did not get the charging symbol to know that it was charging and the screen was blank. I read forums on the net to see if I could find out a problem. Still now the screen is black. Only when I hold the on and home button for about 10 seconds, then the screen comes up with the red battery, that will blink twice, and the cord that says I need to plug the iphone in to charge the phone. After the red battery blinks twice the screen goes black again.

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Having recently tried no less than four replacement batteries all which initially powered the phone but then would not recharge, I solved the "iPhone 4s will not charge"issue by:

1. spraying a small amount of WD40 into the iPhone's charging connector to chemically clean the connections

2. connecting and disconnecting a charge lead a number times to clean the contacts mechanically

As you may already know, WD40 is a water displacement product used for cleaning electrical contacts among other things. It worked perfectly in my case.

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Dave Brenneman will be eternally grateful.
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