Monitor turns off after 2-3 seconds. Help!?

My monitor turns off after 2-3 seconds of turning it on. When I turn it on there is a blue light indicating the power is on but after a 2-3 seconds the light goes out and the screen goes black. The light is supposed to be orange. After it goes out I tried pressong the power button but it won't turn on. I... show more My monitor turns off after 2-3 seconds of turning it on. When I turn it on there is a blue light indicating the power is on but after a 2-3 seconds the light goes out and the screen goes black. The light is supposed to be orange. After it goes out I tried pressong the power button but it won't turn on. I already secured the cables, reconnect them and double-checked the connections but still it's no use. Help!
Thanks in advance!
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