iphone 7 no power low amps - GSM-Forum

joeyfog · 04-10-2019, 16:02

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.

infodgh · 06-15-2019, 17:02

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?

trabyka · 11-24-2022, 09:57

I have same problem. I changed the tristar, but nothing happend. Anyone have any ideas?

professionalun · 12-02-2022, 21:39

check component near tristar...there is 2 black ic's

Don_R · 12-12-2022, 22:16

Check coils next to CPU

hichrawi · 12-20-2022, 15:35

thnks pro

04-10-2019, 16:02	#1 (permalink)
joeyfog Junior Member Join Date: Dec 2010 Posts: 11 Member: 1476157 Status: Offline Thanks Meter: 0	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.

06-15-2019, 17:02	#2 (permalink)
infodgh Junior Member Join Date: Jul 2013 Posts: 7 Member: 1975191 Status: Offline Sonork: massidgh Thanks Meter: 2	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?

11-24-2022, 09:57	#3 (permalink)
trabyka Insane Poster Join Date: Feb 2003 Location: Hungary, Gyor Age: 43 Posts: 78 Member: 20861 Status: Offline Thanks Meter: 15	I have same problem. I changed the tristar, but nothing happend. Anyone have any ideas?

12-02-2022, 21:39	#4 (permalink)
professionalun Junior Member Join Date: Aug 2017 Location: INDIA Posts: 29 Member: 2749507 Status: Offline Sonork: 33333 Thanks Meter: 6	check component near tristar...there is 2 black ic's

12-12-2022, 22:16	#5 (permalink)
Don_R Freak Poster Join Date: Apr 2006 Posts: 227 Member: 256801 Status: Offline Thanks Meter: 49	Check coils next to CPU

12-20-2022, 15:35	#6 (permalink)
hichrawi Junior Member Join Date: Dec 2022 Location: tunis Age: 36 Posts: 2 Member: 3027886 Status: Offline Thanks Meter: 0	thnks pro