Attn, Dave:
I have the Keysight (Agilent (h/p)) MSO-X 2012 and in your teardown, the mains p/s connects to the mainboard with a connector that looks very much like the one on a PC motherboard (old style) minus the coloring of the wires. There are many DC 12V p/s that can be used to make a PC run on batteries--I have done this for years--and the dropout voltage on the p/s is low enough to use LiPo 3S to power the scope.
Before I open my scope to check conformance to a PC pinout, is this a dumb idea--to go battery power? My reason is to isolate so that using an EKG hookup to a human (me, for example) doesn't result in a reboot or 'bricking' of my central nervous system. The standard is for 'isolation' but is there another way?
Thanks,
Donal