I've never seen anywhere that sells replacement ribbon cables. You may be able to repair the cable, but it's probably not going to last very long. You make be able to find a broken monitor and use the parts, otherwise it's probably new monitor time.Mine started in the warm weather, but i look like i stand corrected even though th eribbon cable is in properly if you eject the cassette to bring it down and gently tug the ribbon cable in all directions the colour an come baack. any idea where i can get a replacement ribbon cable???