[SOLVED] Strange behaviour - MFC preset name clears out and AFX screen blanks

Interesting thread.

After reading this - and having found some very bizarre problems in the wiring of my house, let alone what might occur in any given venue - I would recommend carrying and using something like this:

Amazon product ASIN B008E07HM2
(No particular recommendation as to type/brand; similar testers can be picked up at virtually any hardware store.)

Sometimes, the things that electricians do are downright scary...
 
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