It won't turn on when you rotate the wheel, or push the button on the right?
You have electric start?
You checked that it's not disconnected?
It's got three connectors, one of which isn't used..
If it wasn't lighting up previously, but still working you've got a broken wire somewhere. It may have displayed the LCD but with no backlight.
It would have been running solely on the back up battery, a button cell in the computer. It's on the bottom of the unit.
When it is completely disconnected, if it shows nothing after pressing the rt button, you need a new button battery.
