Hi - I have a vision fitness R2050 model. It has been lightly used and stored inside. No obvious issues or damage. Problem is that it will not "start" now. What is the most likely issue and how to trouble shoot? The light on the power adapter is on so I am thinking the power supply is working but when the on button is pressed, there is no display light or activity. Rosemary Broome 650-851-5690