Same issues from me with my GX701-GWR just purchased last month. The green flickering lines are constant and also appear when trying to use video in Discord. Not sure how to proceed...
Well, I think I finally found a solution after a month of tinkering. It seems to be directly related to the intel i7-9750H CPU. When I use Throttlestop to force a disable of Turbo mode on frequency I have yet to notice any crackling or sound problems...
I purchased a GX701GWR about a month ago and I have been tearing my hair out trying everything under the sun to solve this issue and have yet to come to a solution.From reinstalling windows fresh twice now, various forms of drivers, external speakers...