One distorted channel in my tube amp

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I have a vintage Precision Fidelity M-7A I was running in mono. I replaced the 12AX7's in the pre-amp sections and then noticed that one channel was badly distorted.
I checked the bias and the bad channel shows no DC voltage for the bias control on that channel. Any ideas which components I should check or replace first?
Could this damage the output tubes or transformer at all?
Cheers! and sorry for the personal lack of knowledge in this arena.

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Topic - One distorted channel in my tube amp - tubesforever 18:35:25 09/13/05 (2)

Re: One distorted channel in my tube amp - corerosin 23:26:13 09/13/05 (0)

Re: One distorted channel in my tube amp - Sherlock 19:11:06 09/13/05 (0)

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