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Board arrived without turning on. I found oxidation in the oxidation on R1663/62/66/26. I replaced them all and it didn't work. Checking the voltages, I noticed problems with the SMC. Replaced it and the mac turned on, worked perfect for two days and stopped. SMC bypass did not work. PPBus is...

problem was the U8000. Replaces and stabilized 3.3v_S4 Thank you very much for the help!

I replaced the R4804, it didn't solve the problem. but I discovered that pin 2 (PP3v3_S4) has 2.1v

Perfect board. No oxidation. Does not work before starting MacOs. I changed the trackpad flex, it didn't work. I checked the resistors near U4801, they are OK. BUTTON_DISABLE - 0v Smc_lid - 3.3v PP3V3_S3_PSOC - 2.1v (weird) USB_TPAD_N - 0.500 and 0v diode mode USB_TPAD_P - diode mode 0.530...

I put it to wash in the ultrasonic tub and it worked. I'm in testing.

Clean logic board, without oxidation. When I connect the power supply, it turns on, runs the cooler for about 7 seconds and restarts. During testing, it turned on normally. I assembled it all and when the system started, it froze and the screen was all streaked, it didn't turn on again. I...

I'm an idiot. The problem was R7012, I was fooled by the protection, it was underneath. Once again, thank you very much for your help.

Logic is perfect, no oxidation. The Mac works, but does not charge the battery with original magsafe. I changed the working DC, removed it from another Mac to test. I changed the Q7180 (new) twice. I checked and the R7110/11, 7151/52, 7121/22 are OK. PPDCIN is at 3v. Any tips?

Did not work. I washed the logic in the tub, but the problem continued, probably a bad PCH. Thank you for your help!

With a "new" SMC, it worked again. Let's go to the tests. Thank you very much for your help, once again!

Strange, when the board doesn't turn on for a while (from yesterday to today), it turns on. It pulled 0.600 from the source, dropped to 0.400, turned on the screen and showed the apple... Then it turned off. She returned to the problem, pulling 0.020 in the source.

After reballing at SMC. PM_DSW_PWRGD - 3.4v SMC_ADAPTER_EN - 3.3v PM_BATLOW_L - 2.8v (didn't have it before) PLT_RESET_L follows 0v

Battery is charging. But the board doesn't turn on. PM_DSW_PWRGD - 3.4v SMC_ADAPTER_EN - 0

I had removed the J6100. Without the R7100, the SMC_RESET_L remains low, even when replacing the U5110. I put the R7100 back in place and now I have 3v. But PPBus remains 8.2v SMC_ADAPTER_EN - 0 SMC_PM_G2 _EN - 0 Maybe the SMC chip I got is bad?

Today PPVRTC_G3H is fluctuating between 2.8 and 3.3v. Yes, original MagSafe 2 85w! nothing happens with SMC bypass.

Reballing and it didn't work. I got an SMC chip and replaced it. I returned to the initial problem. PPBus 8.2v and SMC_RESET_L low. The R5100 is fine, 100k. I have 3.42 on pin 1 and 0.6 on pin 2.

The board is perfect, without oxidation, but very crazy. I have different measurements. She already pulled 0.260a, turned the cooler, but it didn't turn on. most of the time it pulls 0.020a and without a cooler. Measurements change frequently. When I had 3.3v on PPVRTC_G3H, PP3v3_SUS was 0...

The board was in good condition, but it wouldn't turn on. PPBus had 8.2v and SMC_RESET_L was low. Replaced the R5100 and the Mac came back. It worked fine for two weeks and stopped. The font pulses up to 0.160, as do some lines. RTC_RESET_L - 3.26V PCH_INTRUDER_L - 3v PCH_INTVRMEN - 2.5v...

I discovered a resistor (R3517) with a soldering problem. I decided to soldier him again. Thanks a lot for the help.

It's not correct! VVC - 5v EN - 0 I checked the EN line in diode mode and got 0.540.