I don't know that much about arcades but my advice and questions would be, Did it rain the night day before? Are the AV cables in properly and the in the right places? From personal experiences two tv's did not work from being old and the place where you insert the cables are a bit messed up. I would try and play you xbox on another t.v and that will determine if it is the T.V or the Xbox. If its the T.V, pretty self-explanatory Get a new one or use another one. If its the cables buy the HDMI ones like another user said for a dirt cheap price
Birdy