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Repair information and guides for the iPhone 6 that was released on September 19, 2014. Model Numbers: A1549, A1586, and A1589

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iPhone 6 screen won't turn on or connect to computer.

The History:

My phone has been having battery issues and screen issues for a while. It would get very hot when I used it or charged it, but especially when I used it. The battery life was terrible and didn’t last long. I’ve done quite a few repairs before so I replaced the front screen assembly, the battery, and the rear camera lens (which was cracked as well). the phone was working great. Then two days ago, someone dropped it and it cracked again. (Sighs, oh well, the non-cracked screen was great while it lasted.) The crack wasn’t bad at all and i don’t think its the cause of the problem but it could be.

The problem:

Last night, I placed the phone of the charger, before going to bed. ( I do not use a apple original cord. I do use an original AV wall adapter but the cord is an off brand ) I heard it make the sound that it makes when it connects a few times but I was too lazy to get up and go put it on the iPad charger. :/ (I have had somewhat of an issue before with the phone connecting to the charger properly. I only ever had issues if it was charging the phone after it had died. It would restart and then die again, restart and die again, ect. I usually put it on the apple original charger that I have and it doesn’t have a problem. ) I heard the sound three times and then fell asleep. When I woke up this morning, the phone wouldn’t turn on at all. I’ve tried all the normal fixes. I’ve tried holding down both the home button and the on/off button. I tried connecting it to several different cables and wall adapters and my mac laptop. When connecting it to the laptop, it doesn’t show up and i receive the message, “Could not connect to ‘APEndpointAggregate’ “ I’m not really sure what to do next. Any help is greatly appreciated.

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Sometimes the damage from a drop isn’t apparent immediately.

When troubleshooting charging issues, I would do the following (in order):

  1. Always try another Lightning cable and charger, preferably Apple original or MFi certified units.
  2. The Lightning cable 8-pin connector should be sitting flush with the housing and completely inserted. If it is not, there could be lint/dust/debris inside the port impeding a proper connection. You can clean it out with fine point tweezers or a dental pick. Just be careful not to damage the pins inside the Lightning Port.
  3. Change the battery. The battery is the weakest link in the entire phone and certainly for charger related issues. It is also the easiest thing to replace. Use a battery utility, such as coconutBattery (for Mac) or 3uTools (for Windows) to test the battery prior to removal. Anything less than 70% of design capacity will require replacement.
  4. If the battery is in good condition, you can use a USB Ammeter to determine if the phone is really drawing current when it says it's charging. If it isn't drawing current, then I would change the Lightning/Charge Port.
  5. If a new battery and charge port still don't resolve the issue, then you either have faulty replacement parts (possible) or a logic board issue. There is an IC (commonly referred to as Tristar) responsible for communicating with the charging device and uncertified chargers can damage it. Unplug the battery and connect a known-good (preferably Apple original or MFi) charger to the phone. A properly working phone will show an Apple logo and boot loop. If the Tristar IC is bad then the phone will not do anything.

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2 Comments:

Thanks for the response. I’ll try these.

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Thank you! I did end up changing the lightning port and it seems to be working fine.

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Weird, I've been using a third party cord. Have you dropped the phone recently? If yes, try opening the phone and clean the battery ribbon contacts.

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Thanks for the response. I will open it up and try reconnecting and cleaning the cables. To answer your question, it was dropped a few days ago but was working fine right before the left it on the charger overnight like I normally do.

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I did try opening up the phone and cleaning and reconnecting the cables. No banana

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Jamie Cade will be eternally grateful.
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