hoping someone may be able to help, i'm using my Helix floor with a Laney Lfr212 using quarter inch out and its recently developed an earth/static fault where theres an audible buzz which goes away when you touch the strings which gives a click very similar to what you get with a valve amp with a dodgy guitar lead. So far i have tried different power leads ,different guitar leads,different guitars,plugging into a different amp ground lifts none of which solves the problem which leads me to think that its internal, has anyone else had a similar problem and what was the fix. thanks in advance