No ring lights on xbox 360 slim

I have no ring lights on my xbox 360. When i touch the power button it sounds the “ding” sound and turns on, but there is no ring light and no display on the tv. The cd drive and the eject button also works fine. First i tryied turning it on and off several time, and after trying 20 to 30 times suddenly there was a picture show on the tv and it went off.

So can any one help me fixi g this issue on xbox 360.