Rockrecorder Posted May 4, 2014 Share Posted May 4, 2014 Today I tried to switch my DT50 212 on. I flipped the power switch to 'on', while in standby mode The powerlight went on for a second and turned dark. The powerlight stays dark but the tubes are glooming. When I switch standby off, a humming comes from the speakers. Playing a guitar does not work. Quote Link to comment Share on other sites More sharing options...
stumblinman Posted May 4, 2014 Share Posted May 4, 2014 Bad tube is my guess. May be drawing too much current, causing the voltage drop, which keeps the light from staying on. Humming and no sound is a pretty sure sign of bad tubes. Quote Link to comment Share on other sites More sharing options...
Rockrecorder Posted May 4, 2014 Author Share Posted May 4, 2014 Thanks for the tip but unfortunately that wasn't it. I exchanged all tubes but the problem stayed. Quote Link to comment Share on other sites More sharing options...
stumblinman Posted May 4, 2014 Share Posted May 4, 2014 Yeesh. Perhaps a bad transformer then. How old is your amp? Thanks for the tip but unfortunately that wasn't it. I exchanged all tubes but the problem stayed. Quote Link to comment Share on other sites More sharing options...
Rockrecorder Posted May 9, 2014 Author Share Posted May 9, 2014 The transformer was ok, I checked power cables and connectors and found a bad power plug. btw - The Amp was purchased February 2014. Thx for the support 2 Quote Link to comment Share on other sites More sharing options...
Brazzy Posted May 9, 2014 Share Posted May 9, 2014 The transformer was ok, I checked power cables and connectors and found a bad power plug. btw - The Amp was purchased February 2014. Thx for the support Nice to know, Thanks for head up. Quote Link to comment Share on other sites More sharing options...
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