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I always get this model board with this problem. It had oxidation near UB300, with a short on the PP3V3_UPC_TA_LDO (CB308) line. I ended up with the short and the UB300 pulled 5v - 0a, the others 5v - 0.25a. So I replaced the UB300, now all ports pull 5v - 0.25a. Voltages and measurements in...

The child was born!!! =D I changed the U7000, the C7050 went to 12.2v. I put the F7000/1 back in, the board turned on and is charging the battery.

Without the F7000/1, the C7050 has 1.3v L6960 diode mode - 0.430

Now I have some voltages that before, with 20v, I didn't have. P_IN - 5.2v AUX_DET - 1v SMC_RST_IN - 0 VDDA - 5v VDDP - 5v EN_MVR - 0 AUX_OK - he is an NC, is that right? AMON - 0 BMON - 0

diode mode, 3V3_G3H_RTC - 0.440

Sorry, I haven't checked yet. But CD3215 have changed. Do I test the U7000 even with them strange? I checked the LDO lines in diode mode and all four are OK. But the voltages are strange. I no longer have any of the 1.1v LDO line (with charger in the port for the CD3215). The 1.8v line only...

I had 20v, no battery. but during testing, it changed. Now I only have 5.2v and 0a. PPBus dropped to 1v. I was checking the voltages and disconnected the source, when I connected it again, it was pulling 5.2v. What I managed to measure until I lost 20v. P_IN - 20v AUX_DET - 0 SMC_RST_IN - 0...

Did not work. I mounted the logic board on another Mac, it turns on with a charged battery, but it doesn't charge. The board doesn't turn on by itself!

Sorry, but I hadn't noticed. but it fluctuates between 0.03 and 0.08. I have PPBUS_G3H (12.3v) and 3V3_G3H (3.3v) together. Yes, all USB-C ports the same. C7020 - 4.7ohms C7023 - 4 ohms

I've already tested it with others and the direct charger. Same problem.

yes, always with original charger! the 87w one!

Only the board on the charger doesn't turn on. It is at 20v 0.08a. The board with a charged battery turns on. When I connect the charger, it stays at 20v, goes 4a for 1 second and drops again. I checked all CD3215s and they are OK. In all of them I have the 1.1, 1.8 and 3.3v line. Just the...

Board still working. But, WiFi stopped. I found that PP3V3_G3S_WLAN shorted (diode mode 0.008). When I put it on the charger, the U3730 gets very hot. Is it worth changing?

I changed what you suggested and put in new chips (C3215). Board turned on again. Anything to pay attention to in testing?

Yes, original charger. It stayed on charge for around 1 hour. Then I turned it off, took out the charger. Today I went back to test, everything had toasted. The board is perfect. no oxidation. Do I put the new chips in and test?

I ended up removing them all. On each chip, the 3V3_UPC line was shorted, when removing the chip, the short ended. I didn't say it, but the U3100 was causing a short on the PP3V3_G3H_RTC line. Since I already made the mistake of removing them all, any tips?

The Mac had its logic board replaced in another service with a board that came from China! It arrived to me without working. All CD3215 chips were shorting the PP3V3_UPC, the U3200 had a burn mark. I replaced the four chips and the Mac turned on again, I tested all the ports, and the battery...

It does not recognize it in target disk mode or in the MacOs installer

Logic board is clean, without oxidation. I already cleaned the J9600, checked continuity. PP1V8_SSD_COLD - 1.8v PP1V2_SSD_HOT - 1.2v PP3V3_S5_SSD - 3.3v PP3V3_2V7_NAND_VCC - 2.6v PP2V7_NAND_PVCC - 5v PP2V7_NAND_VCC - 5v STORAGE_LB_EN - 3v SSD_RESET_LB_L - 3v LPSR_EN_LB_L - 3v Any tips? First...

I'm testing with an original 140w charger. Only the board, it is stuck at 20v and 0.08v. When there is a battery, the board turns on, I feel the trackpad click and it keeps restarting. C9522 was oxidized and shorted. but the problem continued. It goes into DFU mode, I just tried to revive, it...