The DMD is out on my CFTBL. I had it over at a friends house, got it back today. DMD was working fine for the first couple of games, than went to one line than completely dark/blank. I forgot to grab the key so I can't open it up to look at what I'm pretty sure is a loose or disconnected Ribbon cable. My question is, does it or will it cause any harm to the machine or the non-working DMD to play with a non-working DMD? I have the machine off for now, but was curious if it'd cause an issue to just play the game?