My Passport can't watch movies on tv

I reformated My Passport  (1TB) to Mac osx leopard, stored all my movies on it, but the LG tv doesn’t even recognise it as a USB when plugged in.  The blue light comes on and it humms away.  My older, 750GB Passport has movies from the same Mac on it and it can be used to watch movies on the same tv.  What have i done wrong with this new one???

Try posting in the TV section. Most TV’s and accessories need drives formatted FAT32.

Joe