I have a new used Lenovo Windows 7 and it's great, but the turn on button is acting like it's overused. My friend had this computer at her work and when the company closed down, I was able to buy it....

So I'm wondering if I don't turn off the computer and use the Sleep mode when I go to sleep, how does one "wake up" the computer. I just went to the market and put it in Sleep mode and when I came back and tried to wake up the computer, it wouldn't and I had to use the turn on button on tower.

Any thoughts....thanks much.