Newbee needs help

[Old user]

Hello All, I learned to glide last Summer on a off road model and loved it. Last week I was able t borrow a similar unit at work. It had been plugged in for nearly a year without any use. I unplugged it and hit the power button on the key. All that showed up on the key was two zeros. I changed the key battery and still nothing. Any idea what I should do next. I'm dying to use it but don't know what to do to get it running. Thanks for any suggestions. Old User