I change the hard disk from 500gb to 750 gb then i heard qw sound in some interval pls advice me., i change the hard disk from 500gb to 750 gb then i heard qw sound in some interval pls advice me?

i change the hard disk from 500gb to 750 gb then i heard qw sound in some interval pls advice me., i change the hard disk from 500gb to 750 gb then i heard qw sound in some interval pls advice me?

I wish it was under better circumstances, but welcome to the discussions!
It certainly sounds like a bad HD to me. Back up your data and then take it in or call Apple.

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