2012 13" macbook pro screen goes black

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i editing on trial version of fcpx, when macbook screen went black. able see curser , force quit screen come up. on bottom of screen there looked calibration numbers (-25 0 25 60 75) else black. after 4 minutes screen reappeared. sound software or hardware issue? should replacement?
 

run apple hardware test.

apple hardware test (aht) contains suite of diagnostics test hardware of computer. it's great way rule out hardware issue when troubleshooting computer. if doesn't reveal you're still under warranty , can take apple store.
 


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