(Adam Corolla voice on) "Hey everybody!" Got a quick question. I think the effects loop on my Hartke 7000 may be out. (Or maybe I don't have a clue how to hook it up). Anyways...what's a quick and easy way to check the loop to see if it's working. I've got tons upon tons of rack effects, pedals...etc. Just need to know what to hook to where to be able to tell if it's dead or not. Thanks.