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.
Question mark flashing at startup, same with another good known SSD, there was a bit a water on SSD connector J3700 pin 47, SSD_PWR_EN, cleaned, works fine, no water elsewhere.