on board computer car

Hello, I wanted to build on-board computer in the car. MPGuino - EcoModder Forum Wiki I tried all versions of the program, but no does not work. He'd find anyone here who could fix this program to work? I tried it on ARDUINO MEGA 2560 and later I wanted to ARDUINO NANO

no does not work

Can you describe the problem you’re trying to solve?

For version 0.86 does not work nothing at version 0.75 -0.81 appears in the LCD contrast setting and switches do not respond