Been watching this thread and sitting back as I think Quench has everything well in-hand. The EMI filter was required at the time to suppress radio wave interference. Without it the games wiring could accidently receive or transmit EMF interference that would affect local radio and television receivers.

Here is a quick test I do for every game I work on. Plug an outlet tester into the service outlet and make sure it signals good. If it doesn't test OK there then review the line cord and power wiring.

20221210_110900 (resized).jpg