iphone 6 error 3

Hello,

Check your hardware

If you see error 53, use these steps.

If you see one of the errors below, you might have a hardware issue:

• 1, 3, 10, 11, 12, 13, 14, 16
• 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 56
• 1002, 1004, 1011, 1012, 1014, 1667 1669

Here's what to check. Try again after each step:

1. If iTunes is already open, quit and reopen it.
2. Check your third-party security software.
3. Make sure that your USB cable, computer, and network are reliable. Then try twice more to restore your iOS device.
4. Check for outdated or modified software.

If you still see the error, contact Apple Support.

From:

https://support.apple.com/en-us/HT204770

Then. as the Apple article says, contact Apple since it appears you have a hardware problem. Making an appointnet at an Apple Genius Bar is recommended. See bottom left of

Genius Bar Reservation and Apple Support Options - Apple