[fishingmedic]

I'm gonna go out on a limb and say it sounds like a loose connection if it's happening when you slide the keyboard shut or place it down somewhere, the vibrations are probably causing the connection to "lose" the connection and shut down. Just a guess on my part, but based on a few different people saying it happens when the keyboard is closed or placed down, sounds to me like hardware and not a cab or rom. Good luck and let us know what the store says.