I just received a mint NYC f3 aba diesel set off the web and in conventional I have a horn and diesel sound. But the prime mover would notch up when I tried to address it in command, even during reset attempts. So I opened them up and started wiggling wires and connectors also tapped lightly on the boards and worked the micro switches. Although visually nothing seemed to be out of place ( appeared never to have been open and no notiable wheel/ roller wear as advertised.) Back together, accepting reset code 36. Still no horn,crew talk or towercom. or soft button commands. But does notch up while moving. Oh yea it still does brakes squeal through! Could a chip be loose solder connection or lose some function or memory? Any thoughtful help will be appreciated, thanks forum.