yes i tried with a 1/4 plug of course, and with a transfo 9v.
all 4 jumper are jumping.
so i’ve to check all transitors and reconnect the led to the 3pdt board (have i to put one resistance on this board???)
for this i don’t understand sorry : “I cannot see if the blue wire from the 3PDT board BO pad is connected to the IN pad with a “T” on the main board. I think it is there.”
and an other question, can i use a b250k pot for the mid scoop? with a resistance maybe?