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Why is phone turning on with apple logo and then turning off on repeat

Hello,


I recently replaced the screen on my iPhone 11. Then when I turned it on, the Apple logo is flashing on and off for about 6 seconds then goes dark and repeats constantly. Do you know why this is happening?


Luke

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There could be numerous faults at play here. First make sure the new battery is properly plugged in and making good contact. If the same issue happens try your old battery if it is still working. the phone turns on, your replacement battery is faulty. If the old battery behaves just like the new one it could indicate motherboard damage caused during the replacement.

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I didn't replace the battery, I replaced the screen, but thanks

@llouw03 Yes but hopefully you would have disconnected the battery while connecting the screen and then connected the battery again after. Keeping the battery connected while replacing the screen can sometimes lead to damage when you are fiddling with the connectors and there is live power in the contacts.

Other than that try booting the phone into DFU mode to see if you can reset it with a computer. Alternatively you could try a different screen on the device or try that screen on a different device to see if the screen is at fault or if it's something else on your device.

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