How difficult or restore the connection-sleep?

For a few weeks now my iMac failed to wake up from its sleep mode.  The screen gray remains without much light to it and don't start.  I followed the advice of a previous post, but the problem persists.  See: why my iMac stop or stagnate after awhile?.  I stop the SMC unsuccessfully also.  Suggestions?

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Bronco 01 wrote:

I stop the SMC unsuccessfully also.  Suggestions?

Who should read, I reset the SMC also unsuccessfully.

Tags: Mac

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