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L'Apple iPhone 5s fut annoncé le 10 septembre 2013. La réparation de ce modèle est très similaire aux modèles précédents et requiert des tournevis ainsi que des outils pour faire levier. Disponible en version GSM ou CDMA, 16/32/64 Go de stockage et en argent, doré ou gris sidéral.

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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.

par

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Karolis sera éternellement reconnaissant.
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