Help troubleshooting a faulty pedal.

[barricade]

Hey guys, i need your help. I'm trying to DIY repair my broken pedal, it's a ProCo Rat II.

The Issue: No sound when engaged. There's a signal when bypassed.

here's what ive done so far:

1. replaced a capacitor (C2) which i thought was faulty.
2. i tried taking apart the footswitch, seems like it's mechanism is working perfectly.

i have multimeter.... but i dont know how use it. hahaha 

i cant do electronics for [gooey brown stuff]. 

so.. can anybody show me how to troubleshoot this pedal?

here are the gut shots & schematic

[cacophony]

use an audio probe

[barricade]

up ulit! i need all the kindness and help i can get. 

@cacophony hey thanks for this one. gumawa ako.. mas maganda sya kesa sa continuity tester, mas mabilis tumunog.
but the trouble is.. i dont know. what's going on.

i found a dead spot at Q2 going to the output.. though im not sure if that's what it think it is.

[emil_murillo]

see you tom sir..

[emil_murillo]

mas ok parin yun OP07D → datasheetbro ano.. winner!