I've got an old 27" Mitsubishi in the library that gets a great color picture on some channels, but just Black & White on others. When I first turn it on, color seems to work on all channel, but as set warms up, and I click through channels, some are color and remain so, some are B&W from the start, and some start in a sort of muddy color then almost immediately turn B&W. Don't seem to see much difference when input is changed. I've tried direct cable input using co-ax from the wall to the TV, Tried running the input through the digital cable box out to the TV using both the co-ax and the RCA cables. Funny thing though is that DVD with RCA cables between player and TV plays fine in color all of the time. VCR on the other hand will only play tapes in B&W, whether plugged in using S-video, co-ax or RCA cables.
I'm probably in need of a new set, but the fact that it's an intermittent problem makes me wonder if anyone has an idea for a workaround. Thanks! DS