Doesn’t work even with an original charger. What is curios, one port only draws current if the cable is plugged in in a certain way. If I turn it around , the port is dead. This isn’t like this with the other 3 ports

Hi,

i‘m Markus from Germany. Want to develop skills in fixing all kinds of electronic devices in our household and had some success repairing notebooks. Still so much to learn! Thanks for your great work. Donated to show my gratitude. 🙏...

Hi,
bought a liquid damaged device and am trying to get it fixed as a hobby.
U7600 was shorted and got replaced. Now all ports power cycle after 2 seconds and none negotiates 20 Volts. Ldo bmc reaches 1.1 v on all before the cycle begins again. PP3v3_G3H is at 3.3v.
i checked this sequence https://logi.wiki/index.php/CD3215_Bootup_Sequence and get the correct voltages for step 10 (SMBUS_SMC_4_G3H_SCL and SMBUS_SMC_4_G3H_SDA) with 3.4 v each. I don’t use an original charger but one from my Huawey notebook with 65 w. Could this be the cause? Thanks a lot....