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Apple iPhone 5s는 2013년 9월 10일에 발표되었습니다. 수리는 이전 모델과 유사하며 스크류 드라이버 및 비집는 도구가 필요합니다. GSM 또는 CDMA / 16, 32, 또는 64GB / 은색, 금색 및 스페이스 그레이.

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Does not power on. Error 40 when trying to restore

Hi guys,

I have couple of iPhone 5s which do not turn on. When I try to restore it gives error 40.

I have checked some power lines already:

PP_VCC_MAIN

PP_BATT_VCC

PP1V2_CPU

PP1V0_SOC

PP1V2_SDRAM

PP_1V0_SRAM

PP5V0_USB_PROT

PP1V8

PP3V0_NAND

PP1V2_NAND_VDDI

Those are all present. But I have couple of lines that are missing:

PP1V1_GPU and PP3V0_ACC.

Are those lines required for the boot or to complete the restore? Thank you.

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Hi Ben,

Thanks for a quick response. I found out already that PP3V0_ACC does not impact charging but does it affect boot or when trying to restore? Since PP3V0_ACC and PP1V1_GPU are created by PMIC I probably should suspect it first?

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Credit goes to Jessa at iPad Rehab, made a summary below of video:

PP3V0_ACC (From U2 Tristar chip [ACC_PWR], Pad D5 is location of it under chip) is used for powering lightning accessories (usb fan / HDMI adaptor / unusual stuff) from the lightning dock connector.

Phone will still charge normally without PP3V0_ACC with iPad / iPhone wall chargers and USB connection to computer still works.

Source for PP3V0_ACC explained:

https://www.youtube.com/watch?v=OsIKeFnd...

Below is potential solution from a GSMhosting thread

For PP1V1_GPU short it could be caused by U7 (Power Management chip)

Removing l13 and l14 I assume can be used to confirm if U7 is causing short.

Source for PP1V1_GPU short solution at Post #2 of thread post:

http://forum.gsmhosting.com/vbb/f631/iph...

Edit forgot to say with PP3V0_ACC missing the phone will charge half speed if a USB ammeter is used. 0.9ish-1.0 Amp is expected charging speed for normal charging.

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Hi Ben,

Thanks for a quick response. I found out already that PP3V0_ACC does not impact charging but does it affect boot or when trying to restore? Since PP3V0_ACC and PP1V1_GPU are created by PMIC I probably should suspect PMIC first? L13 and L14 are not short to ground.

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