Make sure the program track is clean, and the loco wheels as well, if they haven't run in a while. Some sound decoders won;t read without a program track booster, have you tried others, especially ones with just motor decoders?
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
I took a few months off from running my layout and now I'm having an issue programming any loco addresses. When I put a loco on the program track, and then use the throttle to switch to using program track, the loco lights come on. When I select "1" use STD (standard), the throttle displays "please wait". It stays in this status and never displays "Manufacturer: xxxx".
I'm using a NCE Power Pro 5 AMP system. I've redone the wiring on the program track but I'm getting the same results.