Audience Au24 - Did any one have problems....?

Never.

(I only have one in use, but it has been in use for a few years.)

Have your confirmed that its not actually a failure of the inputs and/or outputs of the components that the cable is connected to? Otherwise, it seems unlikely the cable simply stopped working, unless you somehow damaged it.

Funny that you mentioned that. I once owned a one meter pair of the Au24s. I ran them from my cd player to my preamp. On several occasions, I too failed to get sound through one channel. What I found was that the plugs were not making proper contact. Each time, I had to pull them out and re-insert them, and then things were fine. Sounds like you might be having the same difficulty. Try re-inserting them firmly. Good luck.

No. Audience all around.

Never had a problem with Audience either.

If you are sure the problem is the cable and if it persists I would consider shipping it to Audience. I am sure they will do a good job repairing/replacing the cable without much extra costs.