OK, we have two DVD players in my room (why, I don't know) and they both have this issue where the video on the TV screen gets brighter and brighter, stops, then gets darker and darker. It's like a brightness setting is fluctuating on it's own, but from what I can tell, no settings are actually changing. This cycle takes about 10 seconds to go from brightest, to darkest, and back to brightest in a smooth but annoying transition. Also, when the cycle reaches its darkest point, the video shakes somewhat violently until it begins to brighten back up. Some odd things to note are that sudden scene changes can interrupt this cycle for no apparent reason, and that the shaking part of the problem usually only occurs on the initial Menu screen, but not always, and the brightness fluctuation issue occurs throughout the entire movie. Does anyone know what could be causing this? Let me know if you need any specific hardware spec or software setting information.