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.
I have a 820-2915-a (2011 MacBook Pro 15) that was running a memtest86 when it spontaneously shutdown. It will not start up again. The power connector stays green, even though the battery is at ~10% charge.
SMC reset does not work.
SMC bypass does not work.
Left battery disconnected overnight...