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.
Coffee spilled on keyboard. Arrived completely dead. Found corrosion around one of CD3215 chips. Fluxed and cleaned area. Board works perfectly now until Keyboard is connected. Connect keyboard and it sits at 5v 0amps. All keys feel responsive on keyboard, but I assume corrosion or short...
SOLVED.
Not that many people probably will be helped by this. But after much swapping of hard drives (both the mechanical and the blade) and swapping of cables, and inspection of board etc. etc. The issue was actually being caused by a short generating from the exposed back of the power supply...
I haven't. Suppose could be something wrong with drive, but 30 years of IT I have never run across a positional hard drive, but as soon as you say that, there's a situation that will stand up and say, "pleased to meet you, I'm your first." ;)
A1419 EMC 2639
Computer came in booting to question mark folder. 2TB Seagate Drive was dead. This occurred shortly after owner updated from Mojave to Catalina.
Replaced Hard drive with 6TB Western Digital. Recreated Fusion Drive with APFS. Worked fine. Used on and off for 3 days loading...