Black Screen, Yellow flashing light on ATV

I am trying to install aTV Flash. I powered down my aTV and inserted the USB and then powered it back up. All I get is a black screen and the status light on my aTV is flashing yellow…can anyone help? Do you think it is an incompatible flash drive?

The flashing yellow light is normal during the install process, however the black screen is not. You may want to double-check the video cable connections.