Speaking of shielding paint, before you yank that jack out, are you sure the cable is not shorting to ground when plugged in to the jack? How deep is your route right under and/or surrounding the input jack? Does it have shielding paint or conductive tape right there? I've seen problems like this before when the route was so shallow that, when plugged into the jack, the tip of the input cable would actually brush the conductive shielding tape lining the cavity and short out the signal. Given the photo you posted, it looks like someone may have gone overboard with the shielding paint/tape in the past. Something I would at least check before putting in a brand new jack and finding out that you still have the same problem. Any chance the tip of your cable is coming into contact with the shielding when you move it about?
Last edited by funkytoe : 12-05-2012 at 02:50 PM.