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Hello , I just bought a broken MacBook Pro A1990 , year 2018 board number : 820-01041A. The previous owner of the MacBook told me that a little bit of water touched the left hand USB C port and the computer shuts off. He took it to the lab and they say that the CD3215C is bad and need to be replaced but they are not good at this . Anyway , I bought this computer and start examine it , here is what I found : All the USB C ports are stuck in 5V / 0.4A ( battery unplugged )PPBUS_G3H is present 12.3VPP3v3_G3H is present 3.3VPP3v3_S5 is 1.3VPP1v8_G3S is missing I am not familiar with the power sequence of a MacBook Pro. So, anyone can guide me what do to next ? can it be a problem of T2 chip ? I thought that if there is a problem with the CD3215C so only the damaged chip will show abnormal behaviour . Thank you for your help.
I would jump over to Louis Rossmann YouTube channel to see how he deals with CD3215 chip and then how to deal with missing PP1v8_G3S Troubleshooting 5v on TouchBar Macbook Pro charger - IMPORTANT INFORMATION on finding the BAD CD3215How to fix charging issues on USB C MacbooksA1706 Macbook Pro 820-00239 not charging or turning on: but why?
