I've got a US cube, it works fine at home on my 100Hz TV but only shows black and white on a couple of others.
All of the TVs support 60Hz, they are fine with 60Hz dreamcast games.
I've tried using the supplied (3x phono) lead, and the £20 Nintendo RGB cable - neither show colour.
I've seen some others (there's a whole bunch here: [Only registered and activated users can see links. ] ) but I'm not sure which ones will work, if any of them.
Any advice would be appreciated...