Compaq presario cq42: Error on power button

I have a compaq presario CQ42 laptop. When I want to start up the laptop, it doesn't respond unusually. I push the power button five times or more, the capslock and F12 blink and so does the fan...5 seconds it sleeps again. Did anybody have the problem as same as I have? Please help me

If you hold down the start button on the compaq presario 42 four about 3 seconds it should start the computer I don'tknow if it will solve your problem.

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