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.
Youtube is full of vids, just mess around with a chip that has no important data in it. If you touch a chip from a working board ALWAYS make sure you have a backup.
If it is an old efi motherboard chip SOIC8 like A1342 they can not be welded together ? anyway I did this whit MXM AMD ( gpu PC and i added efi chip SOIC8 ) been working fine ( boot logo ) but when the iMac been moved they told me it doesn't work and i have to care about this GPU board right now does any one have done this before ?