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Apple iphone 5 went dead, I replaced battery, it powered up to login screen , the battery charge indicator at 25%, started to enter security code and screen went blank. Plugged the phone in to charge and the apple symbol appears on screen then disappears for a few seconds then reappears in a cycle of 9 seconds appearing and 3 seconds black screen. I am looking for the next diagnosis step. Any help is greatly appreciated.
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So it will not boot up anymore? That means you have a boot-loop.
Here is a guide that will help you with that: https://discussions.apple.com/thread/732...
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First of all, keep the iPhone disconnected from power because the more it restarts, the higher the chance of corrupting your firmware and loosing your data (you would need to restore to get back a working phone).
Next, try to reseat the battery. May be the connector is loose.
Otherwise, next get a new battery from iFixit. I personally use them and they have the lowest return on the market. MOST of the rest are junk.
Next, there is a chance you pried a small component next to the battery connector, which is used by the iPhone to transmit info from the battery to the iPhone. This would need micro soldering skills and tools to fix. Use some form of magnification (10x at least) to look between the connector of the battery and the shield next to it. Is there a tiny component missing?
Finally, if after everything is done you still get this boot loop (constant restarting), it means your firmware indeed got corrupted and you need to restore your iPhone from DFU.
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All surrounding components appear to be undisturbed. I was very careful during removal. It appears the "new" battery's connector is misshapen and unable to be seated on the end toward the home button. The top end goes in cleanly, but the bottom end will not go all the way down. After examining under magnification I noticed that the quality of the molded plastic is poor and at the very end of the plug-in the plastic flares out slightly, just enough to prevent seating completely. Re-installed the old battery and connector "snaps" right in and seats perfectly. It even brought up an images of a battery with a tiny red line and the charge cord connector end, as though its telling me to charge it. The battery is 4 yrs old so it's near EOL. I am sending the "new" battery back to it's vendor named Urepair. Hopefully they will refund. I ordered an Ifixit battery. Thanks very greatly for your reply. I would not have looked as closely without someone saying examine things closely under magnification. Good tip!
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If you did this yourself:
When unplugging the battery did you make sure to not pry any small components near the connector?
Sounds like a bad aftermarket / refurbished (used) battery.
由 Ben 完成的
I spoke with a local iphone repair MD that said the same thing . He suggested getting a battery from ifixit, which I am going to do. Ifixit was my first choice but I found something "a little cheaper" on Amazon. Sometimes those decisions "getcha". Thanks for the reply. I concur. BTW, I was very careful in unplugging the battery, as I watched several videos online before removing. Thanks for replying Ben.
由 Thomas Frye 完成的