iphone 6s waterdamage vcc main short

[jaymbyrne72]

hello all.happy new year.i have an iphone 6s waterdamage.i checked power lines and it has a short on the vcc main line.it also has blown backlight filter and 1 of the pads has blown of board.i an looking for some help tracking down the short on the vcc main.i have power supply voltage set to 4v and the amps set to 2.5 .its just that when i injected the voltage into vcc main at C5283_RF cap next to wifi chip it shows nothing for amps on power supply.i have - attached to ground on board .should i not get 2.5 a on the display on power supply as vcc short to ground .if i disconnect both terminals of power supply from board and short them off the board the display on power supply shows 2.5 a

[Alexs]

Also ich habs nun 2 mal gelesen aber nix verstanden :-)

Schreibs doch in Englisch .. ist für alle vermutlich einfacher

[jaymbyrne72]

hi alex .done in english

[Alexs]

Ok can you inject the power direct in the 2 pads from the VCC Main Cap .. Wich Ohm resistance did the VCC Main Line have?

[jaymbyrne72]

ok . i had to remove l4020 and inject 4 v in vcc main at this pad.it then showed 2.5 a on the dc power supply display ,used freeze spray and traced to short to c2096.not sure why was not working when i tried to inject 4 v at c5283_RF cap.

[Alexs]

Ok ... so you removed the short .. perfect ...

[jaymbyrne72]

after short removed and connect screen,battery etc phone shows in itunes but in dfu mode .itunes is looking for me to restore phone but looking to do data recovery .tried to boot out of dfu mode with 3utools but unsuccesfull.could this be another fault on logic board

[jaymbyrne72]

checked dfu in blackfish.to force dfu short tp07 to pp07(pp1v8).checked board over and noticed small bit of corrision under u4500(u2) and in paricular pad f3(PP1V8_SDRAM).removed and fitted new u4500 .itunes now picks up phone in normal mode and looking for passcode.