WHEN RUNNING SEVERAL DVD-R MOVIES AND PS2 GAMES MY TELEVISION DOESNT SHOW COLOUR?

HOWEVER WHEN I CHANGE TV IT WORKS FINE.

ANY ADVICE HOW TO GET COLOUR ALL THE TIME?

Sounds like you have a TV that is going bad. Could it be a PAL/NTSC issue?

Look in your tv menu.
Mine has pal, ntsc and auto.
if yours is simlar select auto and it will pick both formats.

Sounds like the tv in question dosen't support ntsc playback, Most standalone dvd players have ntsc to pal convertors inbuilt try looking in the dvd players menu and set the output to pal or auto, And as for your ps2 a link wire provides all games to output in pal although the console has to be opened up to do this, Or you could always get a new tv.

Does sound like you need to have the link wire done in your ps2 or you can get a lead made up to do the same job