Hello, I have a very strange issue with my Dell Inspiron 7720 and I've seen this forum as the place to get some help, if possible.
So, the issue.
If I use my laptop without the charger plugged in, everything is fine.
But when I plug the charger in, and make a sound (switch between folders, play a music, etc) the speaker starts buzzing and making strange noise (music is playing though and the speaker is working). If I disable the sound codec in Device manager, I get no sound ofcourse, but there is no noise, even with the charger in.
I had the same issues on Ubuntu, as well as Windows 7 Ultimate. I know the chances are minimal, but I'm hoping It's a software issue I could somehow fix, as I really need the laptop and it's working, although this issue isn't quite easy to ignore. And yes, I have a valid warranty, as the laptop is quite new, but not having it for 1-2 weeks would make my life and work quite a lot harder.
Also, if I don't yet take it back, could it mess up something else?
While I'm not sure the cause. If it's still under warranty I would take it back asap.
While it might be a software issue if I had to guess I'd say more of hardware issue with everything you said.
And if it is a hardware issue i'd say it's a short some where that when you plug in the charger causes the feedback to occur when ever the speaker is supposed to make a noise.
I'm not tech expert by any means, but I sure wouldn't chance it. Even if it's a software thing it's not your problem to fix it. Make them do it even if it's a bit of a hassle. It's better then ending up paying out of your pocket.
Btw, does the noise also happen when the battery is taken out?
Yes it does, even without the battery.
I'm not trying to chance it, but the fact is, I need my laptop as I'm away midweek due to college, and I don't have a pc there...
And the fact is the, laptop works, when I charge it up, I can use it normally on battery, or when plugged in, I can use it normally, but without sound.