No sound when connecting FX Loop (HT Club 40)

[Nicoseb]

Hey guys, first post on this forum!

So I've got the following problem: when I tried to connect my delay and reverb pedals to the FX Loop, I get no sound.

The pedals work fine when in front of the amp and I pushed the FX Loop level switch to -10Db for pedals as the manual suggested, but still no luck.

What's in front of the amp: Guitar -> Wah pedal -> Boss ME-25 multieffect ->

Anyone have any guesses what's going on?

Thanks!

[darthchadius]

Does the loop work with just a patch cable going from send to return. If that is working then the problem is not the loop, it is elsewhere.

If loop works, try one pedal at a time. Does one work?

Try running them from batteries instead of a power supply. Again, try one at a time. Do they work?

If they work on batteries, then look into how you are powering the pedals. Try the loop pedals powered without the pedals in front of the amp.

Try one thing at time and you are sure to find the problem.

[M1FET]

Just completed a repair on a Ht 40 with the same fault . The loop uses one half of a ECC83 and that half of the valve had failed.
This occurred after I hade replaced the EL 34 grid coupling electrolytics after a valve flash over.

Just replacing the Ecc brought the Fx back on line