[edison64]

The no color issue, is most likely caused by a bad Colorburst crystal some are mounted in a glass tube and sum are mounted in a metal can check the schematic it will show you where it's at. Also I suspect you may have bad or leaky caps in the chroma section yet, most times when you have no color or you can't even tune in color you can usually adjust the peaking coils in the chroma circuit slightly and you should notice rainbow bars start to appear keep going until the rainbow bars lock into true color. It's kind of a down and dirty way to do it but techs used to do it all the time why hook up all the equipment when you have a fiddle stick.... also the no color issue can be caused by a dirty VHF tuner