Question about Cyber Acoustics AC-840 Headset

2 Answers

Cyber Acoustic AC-840

I purchased a ca ac-840 from office depot last Saturday. It worked perfectly up until yesterday. When I plugged it into the usb port I get nothing, no light, no sound, no nothing. My computer says device not recognized. I have search the net for the drivers but unable to find anything. Would like to try to fix before buying another one. Use it for my job and skyping. Any suggestions

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer
Re: Cyber Acoustic AC-840

Actually i ahve a question too i paly call of duty 2 and call of duty 4 and i want the vocie chat to come through my headset and i ahve the same headset as this guy the AC-840 can anyone help me with this please? Thanx!

Posted on Mar 23, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 53 Answers
Re: Cyber Acoustic AC-840

Heyo....This may sound silly, but some computers have two different USBs....USB1 and USB2, perhaps it is made for one or the other. There may be that there might be an issue with two files that are named incorrectly on your system. If you right click on your start button and select "Explore". From there you need to click on the "Windows" folder, listed on the left side of your screen under "Local (C:)" and then the "INF" folder. Scroll down the list of folders and file names on the right side of your screen. You will see two files listed as "wdma_usbinf.bak" and"wdma_usbpnf.bak". These files should be listed as "wdma_usb.inf" and "wdma_usb.pnf". In order to do this we need to rename the file. Move the mouse pointer over the first file name, "wdma_usbinf.bak", then right click with your mouse. From the pop up menu, you want to click "Rename". The file name will appear in a box in order for you to rename it. Change the name to "wdma_usb.inf" and then press enter. Do the same procedure to rename the "wdma_usbpnf.bak" file. Close the explore window, restart the computer, afterwards plug in the USB headset.

Good Luck

Posted on Dec 28, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Cannot call out

There must be a button to turn on the microphone, you did not do that so you could not call out. Suggest you to look for it then try again.

Tablet pc

Jan 10, 2012 | Cyber Acoustics AC-840 Headset

1 Answer

How do i download the driver

Depending on your Operating System, you may need any CD that came with the device.  If you have Windows XP or newer you should just be able to plug it in.  If you get a message asking you to locate a driver, point it to either the CD it came with or Windows Update (if you have that option).  Otherwise I would recommend going here: and entering your model number in the search box or the support section.  Hope this helps.  Have a great day.

Dec 07, 2010 | Cyber Acoustics AC-840 Headset

1 Answer

What about if the headphone doesnt have a usb...instead it has 2 cables, a pink one and a green one?

Those are separate connectors for the earphone (green) and microphone (pink). Plug them in to the appropriate connectors on your computer. On desktops you will find them on the rear panel (maybe also on the front on some systems), and they will probably be color coded the same way. On a laptop, the connectors are usually on the front edge or on one of the sides.

Dec 03, 2010 | Cyber Acoustics AC-840 Headset

1 Answer

Cyber Acoustics AC-201 Micrphone Problem

i have cyber acoustics headset and i cant hear anything but my Mic works, my sound is all fine, when i plug my headset out i can hear but when its plugged in, i cant hear anything.

Mar 09, 2010 | Cyber Acoustics AC-201 Consumer Headset

1 Answer

Head and mic set does not work in usb drive on ps2

I recommend just going to get a Logitech USB Hedset at wal-mart, but it will set you back 30 bucks. I have Socom 3 and Socom Combined assualt, it works on both without having to use a setup disc, just plugin and play!

Jan 02, 2009 | Cyber Acoustics AC-840 Headset

1 Answer

Cyber acoustic headsets

make sure that your mic is ot muted cause thats what happened to me also check it when ur done in your audio manager

May 26, 2008 | Cyber Acoustics AC-201 Consumer Headset

1 Answer

Cyber acoustic ac 208

The issue lies in the glass fiber wire, the wire is coated with a conductive metal only a fe mircons thick.

Simply put the headset is a poor production model, the use of glass fiber wire more often than not results in a short in the wiring. Thus the sound will come out of one side, not at all, etc.

Jan 25, 2008 | Cyber Acoustics 3-in-1 Headset/Mic Headset

1 Answer

Cyber Acoustics AC-840 USB Headset

heyo...for you online meetings...I am assuming you are using Skype. Check the volume settings in the TOOLS and OPTIONS, audio settings, audio in&out, using the drop down menu for microphone and speakers. Save.

If that isn't a problem, it could be a setting in Windows (also assuming you are using XP). Go into your Control Panel, SOUNDS&AUDIO, Audio tab, check your volume there.

Good luck!

Dec 06, 2007 | Cyber Acoustics AC-840 Headset

Not finding what you are looking for?
Cyber Acoustics AC-840 Headset Logo

1,926 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cyber Acoustics Headsets Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers


Level 3 Expert

4518 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Cyber Acoustics Headset Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides