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hi, my iPhone 4 is dead only turn on when i connect the wall charger as soon i disconnect it the phone turns off i want to know if is the management ic or the real problem, i also changed the battery and clean the motherboard with alcohol....i don't know what to do any more pls help.
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Isit water damaged?
If it turns on ore than likely you have a short with the +/- you can test it by connecting the pins where the battery connect with a multimeter. The pins on each end if they have continuity tht means its shorted. Sometimes it's a bad capacitor
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what is the voltage on your battery connector with the phone being plugged in. Measure the left and right outside contacts.
由 oldturkey03 完成的
Just wondering, is this linked to my issue as well? Here: iPhone 4 After Repair Stuck on Apple Logo & Cannot Restore
It does the same thing when I unplug the iphone 4, it just immediately dies.
由 asdfADRiAN 完成的
Very possible you won't know unless you test with a multimeter or a working battery. I highly recommend taking a closer look at the board and checking if you damaged something. Software restore is not going to fix the issue. .
As for the microphone problem I can almost guarantee that the problem is the audio IC (located on the top left corner of the logic board- you have to take the logic board out to see it) You can resolve the issue by removing a part of the heat shield metal and putting something like a cushion (I used folded paper+tape) to put more pressure on the IC therefore completing the connection.
由 Alfy 完成的
i have a problem with my iphoen 4s
it shows error 50 in restoring iphone
i think it is power management ic problem
plz give me a solution
由 Aashak meeran 完成的
How to check if the ic is problem with multimeter?
由 Animushi 完成的