So Turbokon and I have found that some units that have the switchless region mod don't operate properly. The controller partially works but certain buttons or directions behave different. What is strange on units that don't work is if I hold down the Select button on the controller it's then functions normally.
What is strange - I have a switchless region mod in one of my Turbo Express systems and it works fine. On another system it doesn't, only difference between the two is how the switchless mod is installed, and has LCD mod.
Knowing that the switchelss mod connects to the select line makes me suspect this is somehow related.... very odd