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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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Batter icon while charging then black screen

Hi Guys,

I have just replaced an iPhone 6 screen, when i plugged it into power it shows the chagrin icon and after roughly a minute the screen flashes white and then turns to a black screen not doing anything.

It does connect to iTunes when plugged into a computer and screws were put back in right holes.

Please Help!

Regards

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If I understand correctly, it starts the boot process, connects to iTunes (when connected to a computer) but then immediately shuts off. Does it loop through this process or do you need to turn it on again?

From what I can tell, the battery is pretty much fully discharged and won't charge. That's why you see the charging icon briefly and then it shuts down. This could be caused by either a bad battery or a damaged charging circuit.

So there are a few things to isolate here:

  • Do a good visual inspection of the logic board and the connectors. Look for dust or other impediments to a good connection and look for missing parts, especially near the battery connector. There are critical components there that are tiny (0.5 x 1 mil, or thousandths of an inch).
  • You need to replace the battery with a known-good battery. Buying a battery does not make it known-good as there are many poor quality batteries on the market. iFixit sells good quality batteries but even they are not 100% (sorry guys!).
  • If the battery doesn't solve your problem, then changing the Lightning Port is next. It is between the battery and the charger, so to speak, so it could be causing the issues. Again, there a lots of low-quality "small parts" on the market and buying it "new" does not mean it works.
  • Are you are confident that you re-assembled the device properly (you mentioned the screws) ?

If all of that does not solve the problem, then you probably have a logic board failure that was caused by the impact that broke your screen. In that case, you will need to find an experienced micro-soldering repair shop to troubleshoot and repair the problem.

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5 Comments:

I would like to figure out the problem before going and buying extras that I may need.

When the screen blacks out, it doesn't shut down but the screen stays lit up but black

by

Can you confirm if the battery is charging? If the battery is charging and your device is detected by iTunes, you may have a problem with the backlight. Either a bad screen or again, a problem on the logic board.

by

Oh no. I have had this exact issue before.

Plug the phone into the computer when it's stuck on the black screen light up. It looks like it just rebooted itself into DFU mode.

iTunes should say this phone is in recovery mode and confirm it is in DFU mode by running 3U Tools software.

In result somehow the iOS system firmware got corrupted on the phone. I ended up having to restore the phone.

This happened because I turned on the phone then unplugged the battery while the apple logo was on.

Turn on apple logo then than half a second or a moment it goes to the black lit up screen (most likely DFU) mode?

You may be lucky and get away with just doing an update instead of a restore and wiping the user data on the phone. but most likely iTunes error 27 will occur on update or non-data wipe.

by

I bought the phone off a mate, it came up on his itunes when plugged in but once i have changed the screen and then tried it with my computer it doesn't show up, the battery charging screen only pops up when plugged into the wall.

by

So at the moment it is just showing the low battery screen.

It most likely either needs a new battery or the U2 Tristar Charging IC is busted and needs to be replaced which is a board level component repair.

Try another battery and see how that goes.

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