My aurora started a vibrating or buzzing noise.

My alienware aurora R6 lastnight started to do a vibrating or buzzing noise while i was streaming a game last night and it sounded like it was coming from my PSU, after i turned my tower off and and took the side-panel off to see if there was anything touching a fan or piece of hardware and nothing seem to be in the way. After i put the panel back on and powered my PC back on the noise stopped, I'm afraid my PC will do it again when i start my streams again for now on and  it make a fuss for me again, this PC is still NEW, i purchased this PC back in June of this year already had to send it back once this year for repairs and i cant afford send back my PC now with what i'm doing now. if there is a way to fix this without sending my aurora back and not void my warranty i would greatly apperciate it  for any help.

Thanks