No sound

Exact model number is always a good idea when asking a technical question. Lionel typically used 6-xxxxx on older items.

Example this is one 6-18323 https://www.lionelsupport.com/...omotive-656F-6-18323

That one used this digital horn board

But then there is this other one 6-38402 which uses different TMCC and Railsounds components https://www.lionelsupport.com/...comotive-664-6-38402

Either way, I would ensure the volume control is all the way turned up- as one possible answer.

Okay the numbers are 6-31779 and 73-1779-250. Tried the sound knob and it’s set to sound.

6-31779 is the set with the lightweight TMCC system and a basic horn/bell using Trainsounds.  The 6-38402 is a separate sale HHP-8 with full TMCC & cruise and Railsounds 5.  It also has much more robust full sized motors.

Have you tried turning the switch to "program", powering on and off, then resetting the switch to "run"?

What, me worry?

Hey John is it worth putting a new board in? My grandson got the set from a friend. Yes Alfred have tried.

@hafner33 posted:

Hey John is it worth putting a new board in? My grandson got the set from a friend. Yes Alfred have tried.

Lionel declared all the Trainsounds boards as obsolete and took them off the parts site.  Unless you find one in the aftermarket, you're out of luck.  You could retrofit the ERR RailSounds Commander without too much difficulty, that's one avenue.

Thanks John sorry I missed you at York on Thursday. If my grandson had gotten the set sooner could’ve talk to you then. I’ll look into the ERR board.  Tom

Not sure if this has anything to do with the sound but took off the shell and this gray wire is loose. Any ideas were it should be?

Being a single pin wire- probably antenna on the RCM2

Also, no, that wire probably is not going to fix the sound. It would affect TMCC VS conventional operation.