H 10 won't run

The exact model please.

Yes. It's not taking the new address. The battery is the top suspect.

Get it started and simply kill the power. How long do the sounds play?

It is #20-3055-1. The  sounds are quiet and static and cut off quickly.

Battery is dead for some reason. First, replace and charge the new battery. The speaker may need to be looked at as well.

That's an old engine to be bought last year?

20-3055-1 | MTH ELECTRIC TRAINS (mthtrains.com)

From 2001, it's the 5V board.  That gives me pause.  I'd check the speaker many from that era started flaking their chrome plating and internally shorting the speaker.  That is very bad for the health of the board.  Obviously, a new battery is a must!

I agree with Joe above,

Do not try running this engine until you check the speaker for metal flacking off. The STARR speakers are notorious for this and the metal flacking will likely short out the audio amp on the PS2 board. The battery is likely bad if it still has the original white one still in it as it is almost 20 yers old. The sounds should play for at least 6 to 7 sounds after you turn off track power. This engine may have the flickering headlight problem with the smoke on also.

Battery and speakers, but be careful reattaching tender shell not to pinch any wires and keep connector at rear in same position. Tight fit.

So another myth turned legend.  The bad speaker shorting out the speaker.  How does the magnet crumbling short the speaker coil?  Constrict it yes, lose the magnetic field yes.  I have removed plenty  of bad speakers with out ever seeing a lost audio amp.  Just like I still remove white original dead batteries from plenty of PS-1 and PS-2 5V with boards that still work fine.   G

I don't know about the magnet crumbling, but I had one that had the flaking and the speaker voicecoil was shorting to the speaker frame.  It had to be internal to the coil/magnet because it wasn't anything that was visible.  I probably should have ripped it apart to see why, but once it was identified, I just dropped it in the round file.  I attributed it to the flaking happening inside the speaker coil assembly.

Thanks for the help. I guess I will replace the battery and check the speaker. I picked up a couple of NOS ps2 locos a little over a year ago. They were selling for $300-$350 ,I'm guessing because the ps3s were still available. The same engines now are listed for $500-600 for used.

Coils can open, coils can short, coil leads coming out of diaphragm for solder to the tab can be located too close to the frame.  When speaker vibrates from a horn or whistle they can touch frame.  The flaking is the magnet crumbling, and it distorts the sound, and can effect diaphragm.  But it is not a direct correlation to "always cause" a short, shorted speakers are rare from my perspective other then the manufacture of the lead too close to the frame.

I have only had 2 or 3 shorts.  The fun ones are the ones that only short on a whistle.  That was one of my first as a new tech.  Before I install a BF-34 I always have to check the leads, and some times reposition them with a tooth pick.  G

Ditto on the leads, I've seen those either close to the frame or actually touching it in a bunch of these.  I try to space them and then gently push on the speaker cone to flex and make sure they don't come in contact with the frame.

I've only seen two speakers I can remember with a short to the frame, both 16 ohm ones for 5V boards.  Both were flaking pretty heavily, which is why I attributed that to internal flaking that cut through the enamel insulation on the voice coil.  I didn't actually take them apart, they just made a quick visit to the round file.