Looks like i found the cause of BUZZ sound on 593/793 laptops. Tech guys, you are needed here

vorob
vorob Member Posts: 149 Skilled Fixer WiFi Icon
edited November 2023 in 2018 Archives
In continuation of this thread: https://community.acer.com/en/discussion/534951/acer-predator-g9-593-buzzing-noise-coming-from-speakers-under-full-load-with-video/

So I understood that buzz sound is not because of load, but because of heat. I disassembled my laptop, took a hairdryer and started heating different elements. And after heating this one:
https://pp.userapi.com/c849236/v849236710/4374c/xALDCSedSDY.jpg
I'm getting buzz sound really fast. As it colds down, buzz sound disappears. So I'm 100% sure that the cause of BUZZ is overheating of this chip or smth near it, maybe on the other side of the board. What's that is? Why it's not covered by the cooling system? 

Answers

  • vorob
    vorob Member Posts: 149 Skilled Fixer WiFi Icon
    Okay, it's a South Bridge chip. How it is connected with sound system? 
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    Probably coil whine. Very common. Not necessarily coming from the sound system but from mainboard's small chokes, inductors, & transformers that actually vibrate depending frequency & power they're subjected to. Not much you can do about it except to change  to a more modest power plan  instead of hiperf or maxperf. Jack E/NJ

    Jack E/NJ