I have just been given a nordic track c2000(about 5 years old?) plugged it in and nothing happens. Is there a power on off switch or should it just light up when I plug it in? Also, there is no safety plug in device that does an automatic shutdown in an emergency and perhaps that is the reason why it is not working properly. Otherwise it appears to be in good shape and I am eager to get it started or finding out how to do so. thank you!