I just serviced a pinbank for this model b. However selections A,C,E,G,J numbers 5,7,9 are not working. The individual pin coils were clean with no visual evidence of burn. The strain relief on the jones plug was missing and when I removed the cover found one loose wire. I solder it back on thinking this was my problem but still these selections do not pull pins. Mech does scan if pin is moved manually. I bypassed the selection receiver mating the jones plugs but same issue. Regards Rick