Stereomour Big Spark, no sound

[Samsquatch]

So I flipped on my 'Mour a while ago. A big spark came through the top plate and now I have no sound. Did my voltage checks at the shunt regulator mod, I have no power on the A side. No leds lit on the B side of the board when you're looking at it by the B label on the board. B side voltages are good and the other two leds are lit. What is my next step in trouble shooting, or is the next step a fix? All help appreciated

 

[Paul Birkeland]

Check the resistance of the 130 ohm resistors in the power supply. If one has opened up, that's a possible indication that something may be touching the chassis plate that shouldn't be.

 

[Samsquatch]

Two 130 ohm resistors, 31L - 34L and 31L to 44L are open.

 

[Paul Birkeland]

You'll have to start by replacing those. The most common way for them to blow is by having the 2A3s installed in the sockets improperly.

 

[Samsquatch]

Very innaresting. I will source out the resistors and replace. Thanks, Paul.

 

[Samsquatch]

That did the trick. Sounding wonderful once again. I suspect my teen son was looking around at things and probably miss placed a tube unknowingly. It's okay, he's becoming an excellent guitar player and taking a bigger interest in my listening system. I gave him a lesson in tube rolling and the importance of being aware of tube types and pin types and location. On the other hand, it could have been me, but I don't remember changing or removing tubes between listening for a long time.