Airport turns off by itself and won't turn on back again!!!

hey there, i am currently facing an issue with the airport as by it is turnning off by itself and i cant turn it back on .. i have to restart !!!
sometimes when i turn on my mac like just now happened it is off and can;t be turned on.
please if anyone can help i would really appreciate it
thank you very much

Hey, in case you haven't been able to find a solution to your original problem with airport turning off, i seem to have found the solution for my MacBook Pro. I called Apple Care and they had me to shut down my computer. Then, while holding down the four keys: command, option, R and P, push the power button to turn on the computer. Do not let up on the four keys until the start up chime has sounded twice. Then let up on the four keys and the OS will boot up as usual. They said what that does is reset your "sleep" parameters on your computer. This seemed to have solved my problem.

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