Problem with my 4pole


I have a problem with my shruthi. It work well and after a short time the sound “disappear”. I did all the test and all look like good, i checked all the resistor, tested some capasitor (not all, too lazy…). I think it come from the 4 pole filter but i find nothing.

Little recording :

And my filter board :

It’s been a few months already, and I’m out of idea.

Sounds like a weak solder joint… Go through all your solder joints, reheat them, especially those connected to ground.

rectify :
I have the same probleme when I probe the signal on the 3, and 4-pole.

Problem solve. Weak solder.