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.
"How do you start this in SMC bypass mode?"
Press power button, connect charger and maintain pressing 5-10s.
I suppose to be the same procedure like old models, try it...