Power supply problem ps3

My 500gb PS3 flashes red when I turn it on turns green when I press on red button then immediately turns off on its own.what do I do to fix this problem and my ps3.?

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I have done research and found that perhaps the problem is the hard disk drive. Try replacing the hard drive by pulling off the right-hand cover (it won't do any damage), unscrewing the blue screw in the middle, andreplacing the hard drive. I have the same issue and did hours of research to come up with this. I do not know if another solution will work, but please try. I don't have another hard drive and cannot test this. I hope it will work, Siddharth bhat.

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