If it does not have the standard VGA end it may be hard to get a new cable.
Any color options you can mess with that may make the pink less annoying?
Maybe something is slightly different with the newer screens vs the old ones.
Last time I tried anything like that it was IBM-TV. Same idea, just many years older(you keyboard plugged into it as well so you could control the TV and it used an overlay to allow you to watch in a window while using the PC). At the time everything was CRT.