You need to trace to the point where you lose voltage. Start with your meter set to AC and make sure you have AC voltage at the high voltage secondary output of the power transformer (manual p.29). That is terminals 11 and 12 on the transformer. You should see around 175VAC. If you have that you need to work through power supply, measuring DC voltage at terminals 21, 15 and 13. Also make sure that all of the ground connections are good at terminal 12 and everywhere else in the circuit. We are having a meet today here at Bottlehead, so I may not be able to respond to this thread very often.