I'm sure that alot of EMM's have been sold where the tech replaced it, it still blew the fuse, and then they FINALLY discovered the REAL REASON, repaired it in 3 minutes.....and then just let the customer assume it was truly an EMM failure......to cover all the time they wasted on it.
Then the perfectly good EMM gets thrown in somebody's truck, goes home with them, and ends up on eBay 😂
Cuz that's how $#!t works in this business sometimes.