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 machine 820-00928-a that had a broken display, and I replaced its screen with a used screen in good condition. I needed to format it, I went through the whole process and left it until it was finished, when I went to check the machine it no longer showed an image with any other screen...