Accuphase C-240 Repair - One Channel No Sound Output

This is an example showed a defective relay may cause malfunction for a vintage preamplifier. In this video, I am sharing how I troubleshoot and repair a no output problem. This Accuphase C-240 preamp also had a problem in the phono stage which is similar to my previous repair video (a defective capacitor C11 in the feedback circuit). I did not include the phono repair clip in this video. But if you are interested, please browse my videos and it may help to resolve the problem.