Doepfer

Hi gang!

I bought an A-124 Wasp filter the other day, and finally got a chance to try it out today... but I think it's broken.  The bandpass output is silent, and the LP/HP output is silent for the LP part and audible for the HP part, but it doesn't sound particularly filtered.  I've checked I plugged it in correctly, front and back.  My partner Nina and I have both had a quick look at the board (she's much more up on electronics than I am), and neither of us can see anything visibly wrong with the circuit board.  No dry solder joints or anything of that kind.

Is there anything else I can try doing, or am I going to have to post it back to the shop in Germany?  If there's anything I can do myself, I'd really appreciate anyone's suggestions.

Thanks,
Zoë.