iPhone 7 Plus doesn't boot - GSM-Forum

GfilipeZ · 06-04-2021, 18:09

When i plug the iPhone to lightning power supply, it goes directly to 0.41A, normaly it could be DFU mode. But when i plug to a PC, it don't recognize. I already replaced the tristar, but still the same.
When i plug the Logic Board to a DC PS, even before i prompt to boot, it alreay have a current leakage of 0.035A.
I already checked all the 16 main voltage rails, and no short found.
Checked capacitors near all IC's, no short found.
When i prompt to boot with DC PS, the Logic Board doesn´t get hot and the current varies between 0.060A and 0.180A.

The next step, that i'm thinking to do, is to measure all main voltages, after prompt boot with DC PS.

Any ideia? What else can i do?

SAEIDSANGAN · 06-18-2021, 15:38

Check 1.8 sdram 1.8pp 0.9 nand 2.8 nand

06-04-2021, 18:09	#1 (permalink)
GfilipeZ Junior Member Join Date: Jun 2012 Posts: 2 Member: 1768507 Status: Offline Thanks Meter: 0	iPhone 7 Plus doesn't boot When i plug the iPhone to lightning power supply, it goes directly to 0.41A, normaly it could be DFU mode. But when i plug to a PC, it don't recognize. I already replaced the tristar, but still the same. When i plug the Logic Board to a DC PS, even before i prompt to boot, it alreay have a current leakage of 0.035A. I already checked all the 16 main voltage rails, and no short found. Checked capacitors near all IC's, no short found. When i prompt to boot with DC PS, the Logic Board doesn´t get hot and the current varies between 0.060A and 0.180A. The next step, that i'm thinking to do, is to measure all main voltages, after prompt boot with DC PS. Any ideia? What else can i do?

06-18-2021, 15:38	#2 (permalink)
SAEIDSANGAN Freak Poster Join Date: Nov 2011 Location: IRAN Age: 39 Posts: 190 Member: 1691551 Status: Offline Sonork: 100.1622582 Thanks Meter: 53	Check 1.8 sdram 1.8pp 0.9 nand 2.8 nand