art tube preamp won't power on -- will a bad tube cause this?
2006 ART tube preamp
no lights come on with either phantom power or a proven 9 volt AC power source
can this be a symptom of a bad tube?
thanks!
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@paulbiere probably not. I suspect the tubes are audio tubes driving the amp but not the power. If you have no sign of life start looking at the power supply/circuit. Disassemble it using this guide Art Tube MP AMP 12 AX7A Tube Replacement and take a look for obvious damaged components, lose wiring etc. Post some good images of your boards etc. with your question. That will allow us to see what you see. 在已经存在的问题里加入图片
指南
在已经存在的问题里加入图片
难度：
非常容易
—
2 - 5 minutes
指南
Art Tube MP AMP 12 AX7A Tube Replacement
难度：
简单
—
35 - 40 minutes
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