I have a Sony SL-HF900 SuperBeta VCR that works fine except the
playback is B&W instead of color. Tapes recorded on this VCR playback
in color on my other Betas, but known color tapes always play back in
B&W on the machine in question. I don't have the service manual for
this VCR. It would be nice to at least identify which part of which
board (e.g., the video board) is faulty.