nad left channel goes out


i have a nad 2400 w/ 1600 monitor series...it will be playing just fine, and all of a sudden left channel goes. if i crank the volume up on pre-amp it comes back (i know you shouldn't do this), my question is, how do i tell if it is amp or pre-amp problem.. i do not want to disasmble entire system, if i can just remove one for repair.
jean
inletwolf
i feel really stupid...i dont know what you mean..do you mean right to left and left to right? so i switch the output cables in the back of the 2400? i must have been staring at this thing for too long!!!!
sorry
jean
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
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