For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
Inspect audio board/flex for liquid sign.
Test the machine disconnecting audio flex.
Check diode mode to ground on the T2 lines next to PPBUS_G3H at J6100.