nad left channel goes out

No apologies necessary; I should have been clearer. Switch the left and right channels either on the amp or at the outputs from the preamp (but not both - just whichever is easier to get to). The idea being that the left channel from the preamp is now going to the right channel of the amp and the right channel of the preamp is going to the left channel of the amp. If the left channel still goes out then it's the amp, if it follows the cable switch then it's the preamp.

Dick

I THINK I GOT IT..JUST TO BE CLEAR..I CAN GET TO THE AMP EASIER SO I SWITCH THE LEFT AND RIGHT ON THE AMP, THE ONLY THING IS... THAT I DID THAT.. AND LEFT AND RIGHT ARE STILL THE SAME...THAT IS WHEN I TURN THE LEFT BALANCE IT STILL CONTROLS LEFT BALANCE, AND VICE VERS..EVEN ON THE AMP..THE LEFT CONTROLS LEFT AND RIGHT CONTROLS RIGHT..AT LEAST WHEN YOU ARE LOOKING AT THE SYSTEM..SHOULD IT NOT HAVE SWITCHED SO THAT IT WOULD BE BACKWARDS NOW???
THANKS FOR ALL YOUR HELP..I AM TRYING REALLY HARD TO GET THIS,BUT SOMETHING APPEARS NOT RIGHT
JEAN

oops did not know caps were on....not yelling
jean

Jean,

It certainly sounds like you did the right thing and, yes, the balance control should control the sound in reverse. Just to confirm - you did only switch the cables in one place - the inputs to the amp?

Dick

that is what has me totally confused..the balance control..DOES NOT control in reverse?????????? i thought that was what was supposed to happen..but it still controls left and rt in the same way. the 2400 has the speakers attached to it.. the outputs are plugged into normal(as opposed to lab) on rear i wonder if that is why the balance doesnt change. the a side controls the front speakers and the b the rear..neither one will change from left to right balance..so i am not crazy!! i dont think>>>
just terribly confused..is there an input i am missing on the pre-amp??
jean