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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone 7 / iPhone 7 Plus

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Old 04-10-2019, 16:02   #1 (permalink)
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iphone 7 no power low amps

Got a iPhone 7 no power at all. its Not detected in iTunes.
if I try boot phone on just battery and usb meter It goes straight to 0.41 and stays on that.
If I remove battery and try boot using dcps, I get 0.03 amp current draw.

if i try connecting usb while connrected to dcps it drops my dcps to 0.00 untill i remove usb then goes back to 0.03

No main shorts. checked voltage on battery terminal with usb connected i get 3.75v so im pretty sure tristar is ok.
tryed diff battery and dock connector.
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Old 06-15-2019, 17:02   #2 (permalink)
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I have some problem and i've just reball IC WIFI and replace U2 but nothing.
No short and 0.41 in charging and 0.03 in boot.

any ideas?
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Old 11-24-2022, 09:57   #3 (permalink)
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I have same problem. I changed the tristar, but nothing happend. Anyone have any ideas?
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Old Yesterday, 21:39   #4 (permalink)
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check component near tristar...there is 2 black ic's
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