The buzzing noise increases when I increase the volume. It also buzzes when I plug in headphones. Didn't try with external speakers yet. Figured it'd probably give me the same result as plugging in the headphones. They are integrated speakers.

Hi Joseph,

I am having the exact same problem with my 2305 as well. I took it apart, cleaned it and I also updated the BIOS (thinking it had something to do the with the fans when the computer woke up from sleep), but it still isn't working.

When the service technician came and replaced the components for you, did they happen to replace the motherboard? Or just the hard drive? It seems as though if changing the volume lowers and raises the noise, it either has something to do with the audio output from the motherboard or the internal speakers from the computer...

Best wishes with getting the problem fixed. If I discover anything I will reply to this thread.

Meeparu

thanks Osprey..i'll probably place another call to Dell and have them send someone to replace the motherboard too...better yet, have them change my whole machine..

when the service technician came, he just replaced the hard drive and the internal speakers...he didn't change the motherboard...the noise is definitely coming from the speakers at the bottom of the monitor...if the noise happens for only a few seconds, i'll deal with it..but the fact that it's a constant buzzing, it's the most annoying thing especially when you're working on the PC in the wee morning hours..

I think Dell needs to replace the motherboard.

Glad I found this thread!  I have the same problem w/ my 2305, just purchased a couple weeks ago.  Problem right out of the box.  Quiet at first, but once enters sleep mode or sits the hum appears.

The one work-around I found is to cycle the monitor inputs to composite, hdmi, etc, and then back to computer.  The sound goes away, but unfortunately it comes back!

Do you find it changes pitch etc with the intensity of the display (i.e. lots of bright images = louder noise)?

Bummer, because other than this I really like this machine. 

Yes. The noise changes pitch with the intensity of the display (for example, when I load up a game with intense graphics, the pitch changes). I'm in the same boat as you, BucketBiochemist. I bought this PC a few weeks ago and problem came out of the box. I am going to contact Dell Support again early next week to see if they can replace the motherboard or a new PC.

For those of you that experience this issue, do you also notice an inconsistency with your screensavers?? For me, sometimes the screensaver comes on, sometimes not. Don't know if it's related to this display issue with the speakers or if it's just another issue with my machine.

Just got off the phone with Dell. They will be replacing the system for me. Hopefully this time the system will not have that issue.

Meeparu

Please keep me posted..hoping it's just a select few systems and not the whole line of 2305's..