Hi Roger

Have you had the loco and tender opened yet?

My first guess is the cable connecting the tender and the loco; check that there's no bend pins or damaged connectors.

Check that all wires going from the loco/tender cable is still attached to the PCB holding the decoder in the tender.

Your decoder looks more or less like this one ( Sitting on a bigger PCB ) :



On the decoder, the pins you see on the picture sticking up are a bit fragile, they can break off the soldering to the PCB,
if the decoder has been dismounted and re-mounted; I've seen that a few times.

With the decoder still mounted, try to press a little on the decoder, as if to press it further into the connectors where it's mounted.
Put a small piece of plastic where you press, so your fingers doesn't make any problems.

Most likely you can't press the decode further in; but if there are some bad connections around the pins,
you might be able to make them connect with the pressure you put on.

With the pressure still applied, try if you can get the missing functions to work.

If this doesn't help, I would CAREFULLY pull the decoder out of the connectors holding it, and then give it a good visual inspection,
especially around the before mentioned pins - it can be difficult to see if they don't have connection to the PCB, use lights and a magnifying glass.

If all this doesn't show or tell anything, the next thing I would do is to test the decoder alone, outside the loco.

I don't know how much you can do yourself; but personally I wouldn't buy a new decoder until I was very sure that the one installed is definitely dead.......

If you need a replacement decoder, an ESU XL should fit, having the same pins and size etc. You "just" need somebody to program it for you.

Per.