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Cpu_vr_en = 0v

U1950 Pin 1 = 3.3V Pin 2 = 3.3V Pin 3 = 3.38V Pin 5-7 = 3.38V Pin 6 - 3.38V Pin 8 = 3.38V

SYS_PWROK 3.3V U1950 = ALL_SYS_PWRGD = 3.38V DDRREG_PGOOD = 3.3V L7430 = 1.2V PP0V6_S0_DDRVTT - 0.59V U7400 Pin 2 = 1.2V Pin 12 = 5V

Hi Guys, Basically i got most of the rails, except the PPVCC_S0_CPU. Any hint from this point? Here is some measurements: PPBUS_G3H = 8.6V pp3v3_s5 = 3.3 PP5V_S0 - 5V S5_PWRGD = 3.35V Smc_s5_pwrgd_vin = 3.3V PP1V05_S0 = 1.05V PP1V8_S3 = 1.7V PP3V3_SUS = 3.3v PP3V3_S0 = 3.32v PPVCC_S0_CPU =...

L7630 = 0.117 and going UP U7600 No corrosion

SMC Replaced and i got all those missing rails back, however the PP1V05_S0 is missing.

SMC Reballed and looks the same.

Smc_s5_pwrgd_vin = 3.4v

QuickQuestion: What makes you think the problem is on the SMC?

S5_pwrgd = 3.3v

Everything works. When you get that message, you just need update the OS and try it again. Problem Solved. Thank you

After i tried a couple times, I got an error message: The OS cannot be restored on this device. Gave up waiting for the device transition from REstore OS state to BootedOS state. [com.apple.MobileDevice.Mobile.Restore - 0xFA5 (4005)]

Green Light, but won't turn on. Liquid Damage near by U3210 and the board was properly cleaned. I Trigged SMC_ONOFF_L and nothing happen. PPBUS_G3H = 8.56V PPVRTC_G3H = 3.3V PP5V_S5 - 5V PP3V3_S5 = 3.3V PM_PWRBTN_L = 3.3V PM_RSMRST_L = 3.3V PCH_INTRUDER_L = 3.2V SMC_RESET_L = 3.3V PP5V_S4RS3...

https://support.apple.com/guide/appl...debea5be51/mac

Nothing happen (no error or success). The board seems dead.

Yes, i tried.

The LB is pretty much new and super Clean and here what i got so far: USB-C PM = 5.20V PPBUS_G3H = 12.26V PPBUS_HS_CPU = 12.26V PPBUS_HS_GPU = 12.26V PPBUS_HS_OTH5V = 12.26V PPBUS_HS_3V3G3H_T = 12.26V PPBUS_HS_3V3G3HRTC_X = 12.26 PP3V3_G3H_T = 3.3V PP3V3_G3H_RTC_X = 3.3V PMU_ONOFF_L = 3.3V...

I replaced U3200 and everything works. Thank you for the hints.

What about Pin 6 - 0.23V ?

I'm sorry, but what you mean about "USB ROM chip signal"? U2890 Pins:1-2-3-5-7-8 = 3.3V Pin 6 - 0.23V