On my Elektra, sometimes the "basement" play field flippers will twitch when using the corresponding upper play field flipper is used. sometimes they'll fire all the way like the basement is in play. Sometimes either side getting used will make all of them twitch, it's strange. Last night the four upper play field flippers stopped working in the middle of a round and the basement ones started working like I was playing down there but I wasn't. I unplugged it, plugged it back in and it didn't want to fully boot. Any ideas on where to start?