My MBP, (2.6 GHz Intel Core i7 , 10.8.5) has started to periodically totally go black, like it's shut down, all of a sudden. Then, after about 10, 15 seconds, will come back on, like nothing happened. It doesn't have any rhyme or reason - doesn't matter if I'm typing or not, it will just go black. At first, this only happened once every 2 weeks or so, but now, it's happening once in every work session, like every day. I fear that this is going to keep getting worse and, might ultimately result in total death, which I don't want. any ideas as to what might be causing this?
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