I have a hissing/scratching noise coming out form the left channel, while the right channel stays relatively clean. the noise is noticeable without any wires plugged in, and almost instantaneous when the red power light turned white. May I know what is the cause for this problem?

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kimdeug
396
Jun 4, 2020
Looks like bad tube. Try tu resit it or swap for another tube.
JoeSerp
33
May 21, 2020
I have the same problem and it's a son of a &^&^(.