It was kind of tricky to find out if there is any loose heat sinks before turning it on.
Luckily my unit turned out too be a good one, at least so far.
Sorry to hear about you guys' S9 problems though
IKR!?!? i flip all my miners 360 degrees when i first get them or move them just in case a heat sink fell off on their way to me but the board kept throwing me off a bit. pushing the controller forward and putting a dab of hot glue at the 2 exposed corners holds the controller firmly in place and isnt messy and doesnt take a whole lot of work. it can also be undone with just about no effort on my part too. i just dont like the idea of a pcb bouncing around in a metal enclosure....it makes me cringe.
Agreed, it shouldn't be that hard for Bitmain to take out that slop nor should it really "cost" them any money. I'd like to see them tighten up QA, at the price they're asking, these things need to be bullet proof.