I ejected the front side SD Card to copy some files over. After copying the files I decided to organize a few things on the card, probably took about 10 minutes. When I turned back to the ER-301 the unit was dark, I thought maybe there was a screen saver mode I didn’t know about. Nope, it was out cold apparently as no amount of button pushing or encoder turning was bringing it back.
I power cycled the system and it came right back up. I have about 2000mA free on the +12V rail 6000mA on the -12V. My system had been on for about 3 hours without issue. After powering it back on I removed the SD Card which has now been out for 20 minutes and the 301 seems okay and awaiting the return of the SD Card. Nothing was plugged into any jacks or loaded up when the 301 originally lost power or on the subsequent test.
I don’t expect a response as it was a one time glitch and as of yet I cannot repeat the shutdown. I’ll update here should it happen again.