If you're talking about the little cardboard flap it is just to help
prevent all the carbon dust from getting on the components but it really
won't affect the game negatively in a home environment where the machine
is not powered on 24 hours a day.
--
Fattrain
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Fattrain
Sacramento, CA
Current Lineup: SM-LE, LOTR, TSPP, TRON LE, JP, JM(#1), IJ, SST, DH