RK-1113LP Dryfus ...

1 - you can test the motor by simply getting a DC power source - like an old Tyco power pack; got any friends that do HO? - turning the throttle up, say, half way, and touch one wire to each motor lead - see the light colored wire under your flywheel in photo 4? That's one lead; there will be another one, different color, on the other side. It's a DC motor; the boards turn the track AC into DC. If the motor runs freely, it's OK. Do not use AC from the track directly on your motor.

2 - it's probably your motherboard. All PS1 is "conventional" (not command-control). The sound is just sound. Not sure how they are intertwined.

3 - if you just want to run and care nothing about sound or Protocouplers, get a simple reversing unit from WBB or Dallee Electronics. There will be instructions. The old electronics will go. These units don't cost much.

Have you put a new battery in it?  Although some PS-1 locomotives will run without one, I have since learned that the battery is required for many to work.  And how have you tested the locomotive?  This is how I test PS-1 locomotives.

1) Put a new battery in.

2) Turn the volume knob to half way.

3) Place on track and turn voltage on to 12 volts and listen.  If you hear 3 clanks, it's not going to work, you need to get the board reset kit.  If you hear a double bell and then startup/idle sounds you are good for the next step.

4) Reduce the voltage to 7 volts.  You should get an air hiss/release sound and then a single clink.

5) Push the direction button and it should go into forward.  If you get the double bell again, put a lighted caboose or passenger car on the track next to the locomotive and try steps 3-5 again.  If that doesn't help, put the voltage back to 12 volts and let it sit for 30+ minutes and then reduce the voltage to 7 volts again and push the direction button.  If it still doesn't go anywhere with this locomotive, it may be in deselect mode, which would require a new sound chip from MTH.

BTW, I just happen to have this very locomotive sitting on my layout behind me as I type.  I love it.

Thanks for your suggestions, Sinclair. I will try them, although what I get when first turning on is two dings (no clanks) then she sits faithfully waiting with headlight on but not moving when I select a direction. 

Upon turning off she gives out one ding then a sound from the speaker like frying bacon, which is static, I think.

From the video it looked like you just turned the power off as the headlight didn't come back on.  If that is the case, it sounds about right for the power going off.  That static sound at the end is pretty normal for PS-1 turning off.  That lets you now the battery was disconnected from the sound board correctly so it won't drain the battery.

When you start up lower voltage to less than 10V and try again.  IF still won't move make sure 2 outer pins on engine PCB (go to motor) are not cracked.

Of course it could be software glitch and need to be reset.

Also harness could have a broken wire internally.

WHen you change directions do you get a chuff sound no motion?  If not I suspect more of a board issue than wiring.  G

I appreciate all the help, guys. I am working on each problem as I get time. Weather has turned to 'Spring' here so my time is kinda sparse, but I will keep trying the suggestions.

Thanks again!!