WOZ with the 7.5v boards. All lighting after board W7 is dead. W5 and everything beyond is dead. Jumped between W7 to 28 (board after W5) no lights, then jumped between 14 (board before W7) to 28 (bypassing both W7 and W5), no lights again. Used a different cable and same result. Even tried jumping from W6 (working obviously) to W2, still no lights.
Common sense tells me I should have pinpointed the problem by now but obviously that isn't the case.