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Tube,
Those are called networks. Its the same type or similar of networks that were used in the Predicta's that gave alot of problems. Some of those networks have resistors built into them also along with the caps. I would definately check those because any one of them could kill your vertical sweep. Have you checked your vertical output transformer and the yoke? If you have a schematic i would start with checking the voltage readings and go thru the process of elimination. Sounds like you might have a video output problem too since you get weak audio but no apparent signs of recieving a channel. Sounds like your not getting proper voltage somewhere. Does that set use selinium's? Check those also and if in doubt replace. Dont know what else to tell ya. Hopefully someone with more troubleshooting skills will pop in soon. Good luck!
-Tony
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