Stormin Mormon wrote, on Fri, 19 Dec 2014 19:13:20 -0500:

Model number inside the case, in your machine
probably on the inner ceiling. As to reverse
polarity, you'd have to use a VOM to confirm
the black is hot, white is neutral.

Thanks for that advice.

I can check the polarity, but, really, there's no way
it changed.

So, I must be interpreting the flashes incorrectly.

Here is the full-size secret decoder ring:
https://c4.staticflickr.com/8/7484/1...5d624fe0_c.jpg

Given that, what do folks make of these flashes in
this 30-second video while the cover was still on the unit?
https://www.flickr.com/photos/98287134@N02/16060716735/