I feel this could be related to the issues i have in launchbox with videos playing but remaining black. There seems to be a real problem with video playback in both launchbox and big box that is very difficult to replicate, and when you have the problem it only happens about 50% of the time (for me at least). My setup has worked fine for weeks, and the only thing i have changed are more games added, so i have no idea why i have started having video problems.