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 board 820-3437-b that stuck during boot, keyboard lights up but doesn't reach desktop. I lost its original efi bios because the copy I saved is corrupted. I tried different bios for this board but doesn't work.