Any Strand 200 geniuses out there? Our board is doing momentary "shutdowns." It just happens for a fraction of a second per time, just enough to see the lights dim and come back up. The board blacks out entirely, and emits the "you're an idiot" beeps. This happens with no input; no one touching the board. Sometimes, I've seen "BLACKOUT" on the display as this happens, but the board doesn't normally beep when you press the blackout button. We've tried several power supplies, and even connected to a battery powered computer UPS, with no improvement. Any thoughts or similar experiences?