Sniff sniff, I smell boolsheet!
Here's a couple of tells:
+ The rear housing screws were removed before trying to power on, presumably to introduce the supply fault.
+ Sticky tape has been added to conceal the windows COA sticker, but not the S/N (the roll of tape is sitting on Dave's shelf).
+ If I'm reading it right, the scope has only had one cal from new (June 2010). It seems unlikely a working lab would spend $300k and never calibrate it.
+ The test lead he cobbled together looks suspiciously like the main cable from an Agilent RF power rail probe.
Better give Keysight their demo unit back.