For the past couple weeks I've been having trouble with a very loud staticky buzzing noise coming from the bottom left corner of my Aspire VN7-791G (left of the touch pad below the keyboard) when the machine is under load (working in game engines and playing games, mainly). I've had this laptop for a little over a year and never had this issue before. On the software side everything seems fine, I haven't noticed FPS drops or freezes/lockups or anything of the sorts. I do get an occasional blue screen but those are very uncommon after all the driver and BIOS updates (power state failure or something like that).
The buzzing seems to get louder depending on the work load. If I close all active programs the noise tends to still stay constant for couple few minutes, then it dies down gradually until it's silent completely.
I tried recording the sound, and when I listen through headphones it sounds a lot like the real thing (just not as loud): http://vocaroo.com/i/s1cZvjzHgHs5.
Also: I haven't tried replicating this yet but earlier I was running a game on battery battery power by accident. The machine was completely silent. After a while I got a message saying battery was low, so I plugged in the charger and...instantly heard the buzzing at maximum loudness (not a gradual increase like normal). Could it have something to do with power saving settings maybe? Or more likely to be a hardware thing?