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.
just to update you, I replaced Q7180 and rebuit some traces around R7180 and R7181 and I had a nice PPBUS at 8.58V.
Unfortunately the WD went to the CPU, which directely fried when I had ppbus present, I had smoke coming out of the PCH.
Maybe directely shorted to CPU. so good to go in donor bin.
Again it was a good catch from you, and again thank you