Help, please! 17 "Macbook Pro - USB no longer works

I have a Macbook Pro 17 "2010 edition and I am facing a strange problem which is really harmful to me.  I'm a DJ and use this machine for the job, and she was miss you.

In other words - when I plug an 85w adapter this Macbook, I have a noise in my helmet and my USB ports stop working intermittently.  It causes my controller DJ disappear and reappear constantly in the sound settings in system preferences and makes it so I can't play and music.  If I unplug the adapter 85w, however, everything works fine and I get no sound in my headphones.  I called my local stores and they have never seen this problem, with a store saying that it will need a new controller for a $500 card.

Can someone please give me some clue as to what I could do to fix this?  I tried to reset the SMC but no dice.

Have you tested your power on another Mac adapter or tried a different power adapter on your MBP?

Ciao.

Addendum: Perform a Test of Apple hardware. It may give a clue:

https://support.Apple.com/en-us/HT201257

Note that an error free AHT is inconclusive.

Ciao.

Tags: Notebooks

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