iPhone technically charging(usb amp meter), but wont turn on!

Question

iPhone SE (1st Generation)

4-inch iPhone released in March 2016 with similar hardware specifications to the 6S. Available in Silver, Space Grey, Gold, or Rose Gold with 16/32/64/128 GB storage options. Model: A1662 and A1723

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Najib @icedhand

Rep: 13

2

Postado: 1 de abr de 2020

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iPhone technically charging(usb amp meter), but wont turn on!

Hello

last night i put my iPhone SE in charge after a dead battery, after a while i got a call, and i saw my screen acting weird(white screen with some vertical colors lines) and the phone turned off and wont turn on again.

I checked the LCD with another phone and it work, and checked the battery charging current plays from 0.5to 0.9A with an usb tester, and the battery voltage over 4V, i checked the motherboard and didn’t found a VCC main shortage, and my final check was to test the mother board with lcd, power button and battery plugged in, and the phone wont turn on.

Any idea what should i do or check next, please.

Thank you.

Update!!

I forced my iPhone to enter recovery mode, and i updated to iOS 13.4, but the screen is always black!! So the phone is partially working but no boot and no screen.

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daniel @tech_ni Rep: 34,6 mil 10 22 44 · Answer 1 · 2020-04-03T04:51:45-07:00

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daniel @tech_ni

Rep: 34,6 mil

10

22

44

Postado: 3 de abr de 2020

Opções

Have you connected it to iTunes to check if its recognised.

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Only if i put it in recovery or DFU mode.

3 de abr de 2020 por Najib

Have you checked the backlight and nand circuits

4 de abr de 2020 por daniel

@tech_ni

Thank you for replying.

No, i didn't check these circuits.

Question: Can the backlight circuit prevent the phone from booting? Because i didn't hear neither charging sound nor vibration feedback when putting iPhone into vibration mode.

And for the NAND circuit, i did an iOS update via recovery mode, so i think the chips works.

7 de abr de 2020 por Najib

No bl circuit wont stop it from booting. Do you have a dc power supply.

11 de abr de 2020 por daniel

@tech_ni

Unfortunately, no.

14 de abr de 2020 por Najib

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