I have a buddy's vox Brian May signature amp. It won't power up. I told him I'd look at it. The fuse is fine, as is the AC line. On the PT secondaries I'm getting roughly 6V AC per lead when disconnected from the board. As soon as I connect it to the board, I have no voltage reading. The secondaries go right to the bridge rectifier, would it be fairly safe to assume that the rectifier is the problem? Here's the schematic.