I have ERR AC Commander installed in a Lionel PW 2343. Also installed is a Sound Commander with the F3 chip. Everything was working fine until a couple of days ago. The locomotive was on a siding, idling, when I heard a series of static popping noises from the speaker followed by no sound. I tried resetting the locomotive with no success. The locomotive runs fine and the headlight works correctly in both directions but there are no sounds and no couplers.
I took everything apart but can see no obvious physical damage to any of the components. I reassembled the pieces, one at a time. Motor control works fine; headlight works fine; couplers (both) will not fire. Finally I connected the sound board. Still no sound so I tried raising the volume on the CAB2, nothing. I used AUX1 plus the volume control, nothing. I also tried a different speaker but still not luck. Finally, I turned the volume pot on the sound board but still got nothing. I did notice that after about 3 minutes the sound board was very hot – too hot to touch.
I think the problem may be the main board since it provides power for everything else. I there a way to test this board? Is there anyone who can repair this board?.