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Are there still things I could try here?

0.372V. Identical to my working board.

Yes

P_IN =5.2V ACIN = 1.3V SMC_RST_IN = 0V SMC_RST* = 0.6V VDDP = 5V VDDA = 5V VR_AON = 3V VR1_3P3 = 0V VCC_VR1 = 5.2V LDO_3P0 = 3V LDO_5P0 = 5V AMON = 0V ACOK = 0V

Both 3.6 Ohms. My Probes alone measure 1.5 Ohms.

0V. Q7110 is closed. Current sensing is <6Ohms including my probes. SMC_RESET_L = 0.61V. Diode mode on SMC_RESET_L is 0.56V = identical to my good board. This points to U7100?

I checked all signals at J4700. File attached for anyone who might need those values from a good board... The differences pointed to U4490. I replaced it and Pin 2 was burned and part of the IC was welded to the pad. I fixed all of that and now its back to @ 5V 0A stable. As I already replaced...

Sorry. I tested the same internal flex cable together with my charger and usb-c cable on my 2nd „braindead“ board and ist working fine (20V and charging).

I‘m using an original charger and cable. Both work with an identical device with dead CPU (create 20V and charge) and also with other different usb-c devices.

Still the same behavior.

"Only" U4600, U4470 and U4650 were definitely bad. U4700, U4780 and U7100 were just my next step to try to get the USB communication fixed. 3V3_G3H diode mode is 0.373V, voltage is 0V. With F7140 removed, C7143 Voltage jumps to ~6,6V (maybe higher as my meter might be to slow...) when the...

Hello, this 00045 was water damaged. No obvious signs of liquid. I noticed that U4600 had a small hole in it. I replaced it, fixed a short on 3V3_AON by replacing U4470 and U4650 and changed U4700, U4780 and U7100 but no change so far. My USBC-meter turns on for a second but as soon as it...

Thank you. All 4 ports were dead. The CC-lines were the issue. DZ3301 was damaged (mechanically broken). My guess is that 2 ports were dead because the one DC3215 was shorted. After replacing it, all 4 could communicate again, and therefore all 4 were dead because of the CC-line issue. Now all 4...

Hello, I'm working on a 820-01814 that was water damaged. I got it with U3100/U3200 area fluxed and both ports not turning on USB-C-meter at all. The other two ports were stuck at 5V/400mA. U3200 was getting hot. This board raise a few questions for me regarding CD5215s. My schematic states that...

Thank you. Then I don't need to worry to have missed something obvious. I'll replace some more components around U7750 and see if anything changes.

Sorry. I had no schematic on hand and wrote that post from my phone in a hurry. You are totally right. There are important signals after the coil that U7750 needs, like FB, so it can't work the way I suggested. I thought from my memory of the schematic that lifting L7770 would be equal to...

I don’t have the scematic in front of my eyes right now. Without the coil I thought the voltage would be not as steady as with a coil in place. But I would suspect it being higher than a steady .3V. If the multimeter would not be capable of measuring this I would have used my CRT. My plan was...

Sorry, I mixed that up with 820-2850. I mean MCP as it receives the voltage from U7750 and I don't have a reference to my measured resistance on that line. So MCP could pull that voltage down, maybe? I'd try lifting L7770 and see if U7750 can produce its voltage then?

OK, I'll look more into that. But you think that it's not the GPU causing this? Could the two transistors controlled by U7750 cause this?

With R7801 = 100R I get 2,8V at IC EN-pin, but rest stays the same.