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Problem solved, C3508 was shorted.

Yes 5.2V on both pins. I have removed L3500 and found a short on PP5V_S4_X_USBC, removed the CD3215 ... short is still present.

No voltage on L3500 (P5VUSBC_X_LL / P5VUSBC_X_R) - USB device is plugged in. 5.2V on LB700 (P5VUSBC_T_LL / P5VUSBC_T_R) - USB device is plugged in. Note: U3500 is getting 5.2V on PP5V_USBC_X_VCC, so maybe U3500 is bad?

Hi, I have here an A1989 where the left USB-C ports are not recogizing any peripherals - charging is working - right side no issues. Could it be that the THB IC is damaged or corroded? (Should I reflow the IC?) Note: The MacBook was water damaged in that area, (U3200 was bad)

So?

What do you mean with " points to problems with some secondary supply " ? How to bypass T2 chip?

Sry for my late reply .... L9080 = 0.373 L9020 = 0.333 PPBUS_G3H = 12.28V when USB-C output is 5V / 0.16A PPBUS_G3H = 1.2V when USB-C output changes to 19.4V / 0.05A Bad ISL?

Values = diode mode L7220 = 0.004-5 L7210 = 0.004-5 L7410 = 0.004-5 L7420 = 0.004-5 L7430 = 0.004-5 L7270 = 0.022 L8102 = 0.120 L7702 = 0.110 L8100 = 0.200 LB700 = 0.495 L7600 = 0.390 L7660 = 0.410 L7030 = 0.495 L8410 = 0.850 L3500 = 0.380 L7220, L7210, L7410, L7420, L7430 .. I assume they are...

All 4 ports same behavior. I noticed that PP5V_G3S isnt stable. Note: I tried already T2 restore/review no success always ends with an error.

Hi, every had such a strange behaviour on an A1989?

Hi, I have successfully changed the U7800 ... sadly the device is still acting weird. Why does it keep restarting? Any idea? Video:

Yeah I will try that.

Already tried that, same AC2 error message.

Doesn’t work. Edit: The USB-C voltage meter screen is only turning on/off when I have the cable for DFU mode restore connected to my MacBook (AC2). Any idea?

Yeah same behavior on all four ports. How to do a SMC bypass on a T2 board?

yeah it’s an OEM one. The USB-C adapter screen is just flashing (on / off) …. And no G3S voltages. Edit: What is that noise? (Last couple of seconds of the video) It occurred after the USB-C went off.

I assume you mean "L7660" and "L7600". L7660 (PP3V3_G3H) = 3.3V (stable) L7600 (PP5V_G3S) = 1.3 - 5.1V (not stable) Edit: P5VG3S_EN is also pulsing (0-3.3V) .. so thats possible the reason why PP5V_G3S isnt stable. Source of P5VG3S_EN is U7800? (Bad U7800?)

Yes. Values = diode mode L7220 = 0.004-5 L7210 = 0.004-5 L7410 = 0.004-5 L7420 = 0.004-5 L7430 = 0.004-5 L7270 = 0.022 L8102 = 0.120 L7702 = 0.110 L8100 = 0.200 LB700 = 0.495 L7600 = 0.390 L7660 = 0.410 L7030 = 0.495 L8410 = 0.850 L3500 = 0.380 L7220, L7210, L7410, L7420, L7430 .. I assume...

I have tested it again restoring BridgeOS while the logicboard is in the housing …. All four ports are doing when the battery is connected … Note: Issue only occurs when the battery is connected. Edit: - With battery ... PPBUS = 11V (stable) - USB-C output issue - Without ... 12.57V (not...

that sucks … already the third MacBook with a T2 or SSD issue. Edit: Is it normal that in DFU mode that the usb c output goes up to 20V? Edit2: The battery is also not charging correctly which means the current goes up to "0.15A, 0.35A, 0.55A and 0.70A" and than it gets reseted to 0.00A...