Hello Arnold, I read every one of your posts and this one has struck me like a hammer.
I have a 24 ft. by 8ft. layout and I had added Cab1/L for ease of use. However, when the pandemic hit us all, I tended to run the layout less and now I am unable to demonstrate it to others because I cannot get the trains to run. I disconnected the Cab1/L to no avail and although the ambient sounds seem to work, I cannot get the trains to run conventually. My power supply is a Lionel ZW-C and I am considering removing the control unit and the 4 power blocks and lugging them to my nearest model train store to have them checked out because I know of no model railroad technician, who lives close enough to me in Haverhill, MA to trouble shoot my layout. That is my current stress!