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I AM BACK IN BUSINESS!!! My preamp controls are working and I have great clean/crisp sound. I am definately going to monitor this for a while and I will still call Mesa on Mon. Thanks guys for all your help! much appreciated Thanks, Dom

I am in Los Angeles, and there are a few good places here to take my amp, including Mesa Boogie Hollywood. I am kinda bummed that I got a lemon, But I did get it at a great price, and I am sure that I will be able to get it fixed.

nothing in the loop, already hard-bypassed. Turned off the reverb on both channels and it still isnt working. nothing has changed yet. I did talk to the guy that sold it to me, and he hasn't had this happen. He thinks that its the preamp tubes. Yes I tried all modes. On both channels

Channel 2 is still working great. I tried swapping V1 and V2 and am still having the same issue. Nothing has changed. No sound out of Ch 1 at any setting or volume.

I just bought the amp used, and the guy before me had never changed the tubes (over a year old) so I changed them today, and am still having an issue.

Now I am actually getting no sound through the channel. It was goin and then it would all of a sudden boost really loud, and now... nothing. Channel 2 is working great still.

My Lonestar just started acting up, and the preamp isn't working on ch. 1. The only knob that works is the presence. any suggestions?