Lights and sound but engine won't move

#1 Sounds like you are getting  startup in conventional because the radio receiver is not seeing the TMCC/Legacy radio signal on power up. "Now I have engine sound when I power the track and the lights are on but I can't get it to move with the Cab 2. I've tried clearing the engine from the remote and reprogramming but I'm not getting the horn sound when programming is successful."

#2 Since this engine has MULTIPLE ways of control, highly suggest you try another method- example Bluetooth, Universal orange Lionchief Remote, or conventional control using a variable transformer.

Knowing that these new 2021 produced Legacy engines use the LCP2 electronics platform, a possible failure is the vertical TMCC/Legacy radio receiver rips the traces if any pressure is put on that board. Again, the problem is with these edge soldered style vertical riser card, they are entirely held by the solder joints and traces. I purposely used CA glue + accelerator to reinforce all of my engines that used this style of board system to prevent this possible type of failure. The motor driver board has the same style of connections but does have bigger traces. I cannot stress enough how fragile just plugging or unplugging the Antenna on that vertical riser card could be enough to crack and rip a trace to the mainboard.

Again, validate that the engine no longer works in TMCC/Legacy and it's probably going to Lionel for support and warranty repair.

https://www.lionelsupport.com/warranty

This is a zoomed in area of the TMCC/Legacy radio daughter board solder joints to the mainboard. Easy to see why and how this could fail. The daughter card sticks through the main PCB and then just enough of the tabs and the relationship allows a 90 degree solder blob connection for the 4 points. Since the main PCB is a multilayer PCB, there are tons of through hole vias that connect the layers and specifically some of these 4 important solder joints for the radio section to work properly. Again, fragile is an understatement.

I'm saying this as a precautionary tale so if folks do open up a new engine, pulling on the wiring and disconnecting or plugging in this antenna connect could be a mistake that kills the board. Just be aware.

Wouldn't you know, I go to run my GP30 http://www.lionel.com/products...cy-gp30-700-2133491/ at the local club tonight and the first thing I noticed was no front directional headlight and no strobe beacon. I reset the engine, ensured AUX2 to turn on the lights. The rear lights work the class lamps or markers switch end to end with direction.

Just saying, I feel your pain, this one might be on a trip back to Lionel too.

Thanks for the response, Vernon. I tried Bluetooth and conventional and nothing changes the fact that when track power is applied, I get engine noise and lights but nothing else. Program, run, resetting...nothing changes. Next step: Lionel.

I contacted the too for mine and was doing th back and forth Friday but never got the RMA label. Hoping it was something simple I decided to at least investigate.