It's line level signal, unamplified. I don't quite get what you mean by "tapped" because everywhere that signal goes is essentially tapped or routed via a board or relay as it passes through your receiver. In terms of output, that signal is still being sent to both your amplified and line level outputs simultaneously. Something must have gone wrong on one of your main boards; maybe a relay; etc.... Preamp outputs are always analog.
That sucks. Is it still under warranty?
