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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Won't power on, vibrates every 5 seconds, with replacement battery.

So my battery has seen better days, won't last a whole day (with very sparing use, I'm not a phone junkie) and sometimes dies at like 35%.

I figured it was time for a new one. Ordered the best reviewed kit on amazon.

The replacement process goes fine, and I get the phone all buttoned up and plug it into a charger... and it just sits there with a black screen, vibrating like it's recognizing a power cable every five seconds.

Now from what I've seen online, this has to do with a damaged display, or at least damage to the connection between the motherboard and the display.

So I check the connection, nothing is damaged or kinked, but I disconnect and reconnect the cables and try again. Same symptom. I then reconnect my old battery (failing, but at least with some charge and known to work) and the phone boots right up.

Is this a bad replacement battery? A battery that just needs to charge for a while to get up to a useful load? Something else wrong with the phone?

Answer this question I have this problem too

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UPDATE: Turns out it the flex connector for the LCD was getting disconnected as I put the phone back together. I used a tiny piece of tape to hold it down and the new battery is now working fine!

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Black Friday
Broken doesn't stand a chance.

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I got it working!!!

I had the same vibration every 5 seconds & black screen after replacing a cracked display & plugging in my i-phone 5. I was so frustrated & spent over an hour re-seating all the ribbon cables several times over & everything looked good. Finally I took the advice of someone on one of these forums --- held down the lower round button & the top on/off button at the same time, for 15 seconds until the white apple showed up on screen. I let go & it came alive!!! I was so thankful my prayer was answered.

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Sounds like you have a back battery, try another one.

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Corry Fox will be eternally grateful.
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