hey i have a marshall 401 dsl 40 watt all tube amp... we a few days ago at band pratice my amp just cut out and even though the power light was on as well as the standby swith, the amp would not make any sound.. so i asked around and i heard that it was most likely my tubes... so i checked and some where blown out so i changd all of them out and now they all light up... but! the amp still dose not make any sound at all when its fully turned on... im letting the tubes warm up and every thing but still no sound so what could it be?
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