Sony T.V when turned on clicks on standby no pic.

My T.V is only 4 years old it's a Trinitron with Engery star. when I turn it on the T.V will click over and over on Standby...then if I lean it forward it will turn on. Somtimes if I turn it off and on and off and on the pic. will come up. Does anyone know whats wrong with it? As you can tell I'm a girl that knows nothing about T.V's please help.

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