How to: Properly testing 2nd hand head & cab?

[callmejs]

Hi TB,

Looking for recommendations on how to properly test a second hand amp head and cab.

I want to build myself kind of a checklist, as exhaustive as possible.

I'd like to avoid a "Ohh-I-Should-Have-Checked-That-Before-Sealing-The-Deal" moment... ;-)

Thanks,
JS