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First things first. The clock and channel indicator is generated by a board in the tuner cage. The fact it stopped working may indicate you have a low or missing B+ voltage. See what voltage should operate this card and be sure it is there. Your other problems, bad color, over biased CRT causing retrace lines, and bad video are all caused by different boards. I would bet they also use the same B+ supply as the clock. The shrinking picture also indicates a power supply problem. Check or replace the main filter caps. If one is leaking it should be warmer than the others. This one thing could cause all your problems, and may also cause the picture to be ok for the first few seconds until the capacitor heats up and draws the supply voltage down. I wouldn't do anything to the boards other than reseating them until you know there is no power supply problem. I would also pull the clock module and see what the picture looks like without it. It may have a shorted component pulling down one of the supplies. Good luck these are great sets.
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