Thanks Everyone!
I was able to fix my Lionel PWC TMCC Southern A unit, and both the PWC Texas SP and Southern B Units.
However, the PWC TX SP A Unit is totally unresponsive despite having power and lights.
Here is what I noticed:
On STEP 6: Press the “AUX 1” key, then press "6".....
On all the units that work now, when I pressed Aux 1, it actually changes the LCD from Keypad Numerals to symbols, i.e. the number 6 becomes one of the RPM buttons.
However, despite that the procedure works!
Unfortunately, on that TX SP unit..pressing Aux 1 does not bring up the LCD Keypad RPM button in place of the number 6, instead it remains a 6, and does not fix anything.
Any ideas for that TX SP unit?
The number boards are normal now, it just wont run.