Hi, I was installing a shielded wire from Hi Input I to the 68K resistor in the board on a 100w Major build. I did the pigtail ground thing -on one side only- and wired it to ground on the input jack. The central wire goes from the input jack to the 68K resistor. No sound. If I disconnect the shield from ground, sound is back. I don't get it, I did the exact same thing on another build and it works fine. What am I missing? Thanks.