I liked it, it was lovely, tongue totally in cheek, test procedure almost a trademark of Dave ( aside from him actually using a multimeter to measure if the SMPS transformer in a scope has an open circuit primary) and a thing of beauty and a joy to behold when he got the case off and had a gander inside.
The loose connector is possible, but I have a suspicion there was a little guy who was there putting it in there first, after doing "the deed" and getting the unit written off, who is mighty unhappy that "his" scope was unceremoniously whipped out of the dumpster before his end of day, so he could go and "find it just lying there" to take home.