My GF has just dug up her old PSX (Aus PAL) which is chipped but when we tried playing a few NTSC games they all display in black and white. I remember when I got my PSX (SCPH-5002) chipped many moons ago, I had to get a 'colour correction' chip as well as the modchip to allow NTSC games to be played in colour. It definitely isn't the TV as I know its NTSC compatible and we tried 2 different TV's.
The PSX is a SCPH-9002 and from memory these ones only required 2 points to be soldered together for colour correction? I've tried searching the web for some diagrams or intructions but have come up short If someone could point me in the right direction or has some install pics for the colour mod, it would be muchly appreciated!