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.
If no drop detected at 12V_S5, Q6970 should be good.
However, I recommend to change it, if you are not sure.
It should be available somewhere on Internet...