iPhone not power on
Hello! who faced such a problem? the unit does not start, the consumption of the motherboard without nothing 0.07A does not respond no matter what
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iPhone will not turn on
You cannot get your beloved iPhone 5s to turn on.
Drained/dead battery/bad charging port
Plug your iPhone into your computer or wall adapter to charge. If it does not charge when connected to either of these, you probably have a dead battery or a bad charging port. Replace the battery with a partially charged one and see if it will turn on. If not, then it can be a power button or logic board issue. If it does turn on, plug it in and see if the charging indication comes on to rule out the charging port as the problem.
Bad power button
The button may have lost its click. If this is the case, plug the phone into the computer and let it charge, and see if that will get it to turn on.
It is possible that it appears nothing is happening because the display is bad. If the iPhone sounds like it is working properly but nothing is visible, it is possible the display is bad and must be replaced. Unfortunately, the LCD and glass panel are fused together, and must be replaced as one unit. An easy way to test this is to turn the phone on and listen for a sound. Also you can move the mute toggle switch back and forth to see if it vibrates. If it vibrates or you hear a sound but nothing displays on the screen, then that is most likely the problem. Try replacing it to see what happens.
Bad logic board
If nothing else works, your logic board is probably bad and needs to be replaced. Now it is time to either replace it or diagnose if and what components are bad on the board and replace them, using microsoldering techniques. That is a whole 'nother beast!
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