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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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iPhone 4 doesn't turn on, soundmixer phantom power 48v

My iphone 4 doesn't turn on...

After turning on a digital sound mixer with the 48v phantom power on, those channels were wired to the iphone's minijack, and it shut down my phone and it never came back again. Tried all the reset tricks and still nothing happened.

My wall charger has a green (ON) and orange (charging) status light and when I plug the phone to this power plug, the lights start to blink constantly from green to orange.

Would that be that the battery got blown or overloaded? or would it be the logic board?

Many thanks

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Were you going into the xlr in from the mini phone jack? It is possible that the 48 volts damaged the logic board. If you were going from the 1/4" in on the sound board to your mini phone jack then there would be no phantom power.

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XLR to minijack TRS

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junkystudios, if you applied that type of voltage to your phone through the audio jack, you will have some logic board damage. It will not have made it to the battery, but you most likely have lost a couple of components and IC's in the audio circuity. disassemble your phone and take a good look at the logic board and its components.

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Thanks. What could I do? Replace the LogicBoard? How much can it cost?

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junkystudios will be eternally grateful.
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