Mend it Mark takedown.

[pamphonica]

I loved the original video but Mr Rossman's follow up is also excellent, especially the last minute.
The repair was well handled. I don't have a thermal camera, so I tend to use a cheap secondhand "fault locator" (eg low-ohmmeter) with a tone that follows the resitance reading. Hy-trak or Toneohm.
A particular hate is all those tantalums on 1970s Tek modular testgear (5000/5000 series) that fail short, sometimes after a roman candle display of shooting fire from the top! You just follow the +ve and negative rails with the fault locator and listen for the highest squeak to locate the shorted component.