Reply to Ecler line fader problem

Hi all

I recently picked up a 2nd hand Ecler Nuo 5. The mixer has some wear and tear but generally seems to be in okay condition.

However, the line faders don't appear to be working. It's as if they're being bypassed - channel volume is the same whether the fader is at 0 or 10.

The mixer doesn't have a crossfader in it at the moment. I've tried each channel, different sound sources, turntable, soundcard - doesn't seem to make a difference.

Wondering if anyone has any advice? I assume there isn't a 'line fader engage' button or something I've missed. Next step I guess would be to open it up and have a look.

Thanks