rich, I'll have to disassemble it when I get back home and see if that may be the problem.

Heard, I have the MRC prodigy express2

Thanks Rich, I'll try again to do a reset. If that doesn't work, I'll look at replacing the decoder. 

New user here, I have a GP40 that was working well. My 5yr old grandson was running it and he came to tell me that it stopped running. I have tried resetting the decoder, but all I can do is get the headlight to turn on and off. It moved a little just after it was reprogrammed with some help (hand power). Does anyone have  a list of CVs for this engine? I bought it new, but there was no DCC information in the box with it. Thanks in advance