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Well clearly your audio section is functioning. If you can manualy adjust the tuning cap with out getting shocked that will tell you more about the operational status of the RF/IF circcuits. The some of original paper caps could be open or shorted and cause a no signal condition (tubes, open coils, etc. can cause no signal to be fed to the audio amp as well).
Some sets have fairly simple dial string configurations and can be figured out with out a diagram (this becomes especially easy if the original dial string is still mostly there).
I'm sure it will come back to life if you just keep chiping away at the trouble spots.
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