Members SSheehan925 Posted May 24, 2013 Members Share Posted May 24, 2013 I have a late 80's Mesa Mark III purple stripe combo that I run through a 4x12 rectifier cabinet. Haven't gotten around to addressing this problem until recently, but the amp no long produces sound through any of the three channels. Have tried a different combination of guitars and cables and still nothing. Also plugged my guitar into the effects return jack and it produced a clean tone. However, I recently changed the preamp tubes since this was my suspicion, and still nothing. I had assumed that the power section is fine since sound was produced through FX return. Any idea on what the problem could be? Link to comment Share on other sites More sharing options...
Members ermghoti II Posted May 24, 2013 Members Share Posted May 24, 2013 Does turning up the gain and/or fiddling with the tone controls affect the hiss (if there's hiss)? Could be as simple as a bad input jack, as complex as a nuked preamp. Link to comment Share on other sites More sharing options...
Members SSheehan925 Posted May 24, 2013 Author Members Share Posted May 24, 2013 Tried firing it up again after replacing preamp tubes, if I crank the master all the way up, along with the presence, you can finally hear sound from all three channels. But at a very low volume and minimal gain. Link to comment Share on other sites More sharing options...
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