HAhahahahahha!!1!!!1111 :lol:
Of course if they see a cracked solder joint they re-solder it. I think the silicone is a preventative, to prevent movement and absorb shock in areas they have noticed have a trend to have problems for some reason. I seem to recall when Patrick was gooping my amp, he said something like "I noticed I've had a half dozen amps in the last year that came in for repair that had a cracked solder joint and arcing by this cap, so everyone that comes in for anything, I'm re-soldering that cap and gooping it so it can't move around for any reason..."
So that's how it happens, preventative I guess. There's a sticker on the side of the chassis that every date of service is recorded on, first couple are inspection and burn-in. If there's been any service or repairs after, it will be initialed and dated.