Problems with PT-80 Delay

[Painkiller]

The switch works fine, and the LED comes on bright even when I don't get sound. I have tried different guitar cables, and tried touching every wire and component to search for a bad solder, but nothing...

But today it's working perfectly again.

I will try the audio probe method one time it's not working, as soon as I'm finished with my exams. I will come back with my results.

Thanks for all the help!

[Painkiller]

Today I finally had the time to try and fix my PT-80. And I found the error quite fast 

Apparently, I had managed to cut the copper strip between the 0.047uF cap and the 1M resistor at the beginning of the circuit, right before the first opamp. So I just soldered them back together and that solved all my problems. The delay works great now. No high cut and no volume cut. Thanks for all the tips and help here. Great forum!