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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.

The main problem was the system that did not start, giving a critical update error. There was a lot of oxidation near the U4200 and U3500. I replaced all the components (resistors and capacitor). It worked well for 2 days, but now it doesn't charge the battery (Mac recognizes the charger) and...

I imagined! Thank you very much!

Logic board with no history. But perfect, without oxidation. There was a short on the PPBus because of the Q7430. Replaced it, board turned on again, but with RAM beeping. I have 1.35v on PP1V35_S3, but when I test it off, it shows as a short (023.1), in 0.040 diode mode. I compared it with...

Any suggestion? I analyzed all the components of the line, I replaced 2 that were ugly. But I can't find the short one. Maybe some CD3215 or other IC?

Yes, I always wait to download. In ohms, it's reading 4.9

Clean board, stuck at 5v. I checked the LDOs lines of the CD3215 and everything is normal. I found a short on the PP3V3_G3H line, trying to find where the short was, the board started working again and the short disappeared. 10 minutes later it stopped working and the short came back. I...

Board resolved to work again. Waiting to see if it stops, to do the tests you asked for.

No problem history. The Mac worked perfectly. The PPBus always has 13v, even dead. Battery charged normally during the two days of testing.

Very strange board. Mac arrived dead, but always with 20v. I disassembled it all to check, when I tested it, it worked. The board is perfect. I built the Mac, tested it for 2 days, now it stops working again. When I don't work on the board for a few minutes and the charger connector, from 20v...