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.
Some peoples claim board worked after put it on IR oven.
On the forum is a link about how to reball it even.
But this will only help in case of broken balls.
An internal problem, generated after long time use without proper cooling system, can be solved for short time, or maybe not at all.