I have the SKB PS45 powered pedal board.. The 9v inputs stopped working???? the 3 grounded plugs still work fine. I didn't use it for about 8 months because I was using rack gear, but it worked fine back then, I got some new pedals and nothing work with the 9v inputs? I tried different cables.. It just seems there is no power going to that part of the board.... Any idea what I should do? or what would cause this? Thanks.