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.
It?s a 12? MacBook. That?s all the confirmation you need...
If customer needs data, try reflowing or reballing the CPU. If they don?t need data, throw it in the trash
Sounds like an SMC_LID issue to me...tried known good DC-in board and flex? How do the pins on the trackpad connector and J9500 look? Any chance of corrosion near SMC?