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hi friends
how are you ????
I have a 5G iphone that does not start when I plug on power supply it goes up to 0.04A but does not want to start
When I plug the multimeter it shows me 0.87V
From you where the problem comes from
View pictures
thinks my friends
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Hi Mike. What are you measuring that gives you 0.87V? Is it PP_BATT_VCC? or PP_VCC_MAIN?
With a dead phone, you really have to start at the beginning. Check PP_BATT_VCC & PP_VCC_MAIN to see if they are shorted while the phone is unpowered. I wouldn't put any power on it until I am certain the main voltage rails are not shorted. If they are shorted, then that issue has to be resolved first.
If they are not shorted, then something downstream is causing the problem. I would then look at the output voltages of the PMU/PMIC (U7) to see if any of those are shorted. If there are shorts, then focus on those. Once all the shorts are gone, then power the phone to see what it does.
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My friend
Please how to check the vcc main and pcc bat ??
I can not
When I plug in the power supply it does not ring
And when I apply the cold spray I do not see anything short circuit
LOLLLLLLLLLL
It is turned on by itself
thinks minho thinks friend
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