Hi !
I bought used Boss ds-2 pedal i used ac adaptor and its work . Some hours ago i tried to use 9V battery i put it and i think i moved some cables and now i put ac adaptor and it doesn't work When i move red and black cable from battery input it light red diod but only on one second . What i have to do ?
Resolder the connections for the battery and the 9V socket. Clean out the socket, replace it if the problem persists.