NTSC (black and white)

Hi all,

Just got a copy of MLB 2002 and Triple play 2001 Both U.S versions.

They work fine on my Chipped Psx aroung my house but when i took my playstation around my mates and played them on his T.V they where all Scrolling and in Black and white.

Is this down to the T.V as i find this very strange as the playstation is still outputting the same signal regard less of the T.V.