6s plus No boot

Question

iPhone 6s Plus

2015년 9월 25일 출시. Model A1687/A1634. 수리는 이전 모델과 유사하며 스크류 드라이버 및 비집는 도구가 필요합니다. GSM 또는 CDMA / 6, 64, 또는 128GB / 은색, 금색, 스페이스 그레이 및 로즈 골드로 제공하였습니다.

1041 질문 전체 보기

Rodrigo Maero @rmaero

평판: 45

2

5

게시일: 2017년 8월 27일

옵션

6s plus No boot

I got a 6s plus that came in dead, aftermarket battery. Connecting to charger pulls 0.4A but no boot. Connecting to DC power supply no amps pulled and it will not boot either (it actually pulls 0.02A before promt to boot but I tried it on my own, known good working 6s+ and it does the same)

I thought half an amp is wrong, it should be 1A so I replaced tristar with a new one but still doing the same.

All power voltages I could think of are present. No water or physical damage I could see.

Any clues?

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

예 아니요

점수 0

댓글 2개

How are things looking on VCC_Main?

iMedic 의 2017년 8월 27일

All voltages I measured are there: vcc main, nand, tristar and around pmic power rails are there. Couldn't find any shorts whatsoever

Rodrigo Maero 의 2017년 8월 29일

댓글 달기

답변 1개

선택된 답변

Minho @refectio

평판: 221.4k

Refectio - Mail-in Micro-Soldering Repairs & Data Recovery

15

289

806

게시일: 2017년 8월 29일

옵션

First things first...does iTunes recognize your device if you plug it into the computer? We need to eliminate the possibility of a bad BL or LCM driver. You may have already checked that but we don't know based on your comments.

Assuming the BL/LCM circuit is good (as is the screen), the have you checked ALL of the PMIC output voltages (there are 28 of them)? Start with the main ones like CPU/GPU/SOC/FIXED/SDRAM/SRAM/PP1V1. TRISTAR requires the presence of PP1V8_SDRAM. No need to enumerate them, just tell us which ones, if any, are out of spec or not present.

해당 답변은 도움이 되었습니까?

예 아니요

점수 4

댓글 3개:

I did try to plug it to itunes, it doesn't recognize it. Screen is good, tried it on my own 6s+ and it worked just fine. Current draw on DC power supply shows virtually no amps, so it's not trying to boot. I'll have to make a checklist of the power rails, but all that I measured were present. Will report back if and when I find anything suspicious

Rodrigo Maero 의 2017년 8월 29일

Any update on this problem i have one with same issue.

Tim Lester 의 2017년 9월 5일

No luck Tim, the client wanted it back so I lost this was a no fix. Too bad, I really wanted to solve it

Rodrigo Maero 의 2017년 9월 7일

댓글 달기

All voltages I measured are there: vcc main, nand, tristar and around pmic power rails are there. Couldn't find any shorts whatsoever — Rodrigo Maero
I did try to plug it to itunes, it doesn't recognize it. Screen is good, tried it on my own 6s+ and it worked just fine. Current draw on DC power supply shows virtually no amps, so it's not trying to boot. I'll have to make a checklist of the power rails, but all that I measured were present. Will report back if and when I find anything suspicious — Rodrigo Maero
No luck Tim, the client wanted it back so I lost this was a no fix. Too bad, I really wanted to solve it — Rodrigo Maero

iPhone 6s Plus

6s plus No boot

답변 1개

귀하의 답변을 추가하세요