Right Speaker Not Working

Eagle tech Et-ar504lr-bk 2.1 speaker sys...
June 8, 2010 at 20:52:49
Specs: Windows Vista, 4 GB
So I bought a Eagle Tech ET-AR504LR-BK 2.1
Speaker System and the right speaker isn't
working anymore. The thing is, when I plug the
right speaker plug into the left speaker output, it
works, so it isn't the speaker itself. How can I fix
this problem?

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June 8, 2010 at 21:51:37
Do you have the amp unit on this plugged into a computer sound jack or something else?

If that's plugged into a computer, is the computer a laptop or a desktop computer?

The headphones jack on a laptop has a mechanical switch inside of it. It's supposed to disable the sound from going to the speakers built into the laptop whenever you plug a plug (on a cord) into the headphones jack.
If you have plugged into the headphones jack a lot, it's common for that mechanical switch to malfunction. You could try plugging a plug into the headphones jack, wiggling it, that may get both speakers working, but the only real solution is to replace the headphones jack - that's an item frequently replaced by laptop repair places.

Otherwise, the most likely thing is a wire inside the cable, or the plug on the end of the cable, that plugs into the jack the sound source is coming from, is damaged. If the cable attached to the amp unit that comes from the sound source has plugs on both ends, replace it; if has only one plug, you need to replace the plug, or relpace the whole cable and you'll have to open up the amp unit to do that.
Cables and the plugs on the end of them are commonly damaged by people pulling on the cable rather than only the plug on the end of the cable, or by yanking on the cable.

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June 9, 2010 at 12:22:27
Also, go into the Windows mixer control panel and make sure you don't have the balance slider moved all the way to the left channel.

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June 10, 2010 at 08:14:07
"Also, go into the Windows mixer control panel and make sure you don't have the balance slider moved all the way to the left channel."

The balance slider is in the same places you set the volumes.

For Vista, and probably Windows 7, see Response 6 in this

starting at

" Make sure you don't have volumes set too low or muted, for things you want to hear or use.... "

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June 16, 2010 at 18:40:21
Thanks so much for the speedy responses, I'm sorry that it took
so long for me to respond, I recently just moved to a new place
and didn't have a internet connection. It is a laptop, but I don't
think that it is the mechanical switch that is inside the
headphone jack, as the sound comes through the left speaker
and the sub woofer, but just not the right speaker. I think I am
going to have to replace the plug on the sub woofer that has the
two output jacks that connect to the speakers.

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December 4, 2010 at 12:09:17
I have recently had the same issue with my desktop. Vista Home Premium 32 bit. I have 2 sound cards because I play a lot of games and the additional sound card has it's own processor to free up some power for the game.

The same thing is happening to both sound cards and with a headset and a set of speakers. I have tried checking the balance options and other sound levels but getting no sound out of the right channel no matter what source program I use.

The strange part is I actually heard the sound cut in and out for a few second and then just stay off so I originally though it was a bad wire but I ave ruled out all hardware possibilities and seems to be something with Windows itself.

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December 4, 2010 at 13:57:03

Tell us the make and model of your brand name system, or if you have a generic desktop system, the make and model of the mboard.

The specific model of a brand name system is shown on a label on the outside of the case somewhere, or it can often be determined by going to the brand name's web site and loading a program they have available.
For Dell computers, they have a Service Tag number - the specific model can be determined by using that on their site, or can often be determined there automatically by you downloading some software. The Service Tag number should be on a label on the outside of the case, probably on the bottom on a laptop, on the back on a desktop, and is often also shown in the bios Setup.

The model, sometimes the make, of a mboard in a generic desktop system is usually printed on the mboard's surface in obvious larger characters, often between the slots.

See Response 6 in this

starting at

" Make sure you don't have volumes set too low or muted, for things you want to hear or use.... "

Make sure you don't have the balance for your "master" sound settings set to one side.


When you're plugging in more speakers than just a pair or speakers, then your sound adapter must support you connecting more than just a pair of speakers into it, and
- the software for the sound adapter must have been installed correctly
- you must plug the speakers into the correct jacks

- you may need to specify the purpose the jack is being used for.
If the software for the sound adapter was installed properly, usually a window pops up when you first plug in a jack asking you what you're plugging into certain jacks, e.g. in the case of 2.1 sound, when you plug in the third speaker into a jack other than the one a single pair of speakers plugs into. There may also be an icon in Control Panel for a specific sound brand where you can do the same thing - e.g. I have one for Realtek sound in Vista.
If your sound software was NOT installed properly, then you may NOT have such a window pop up, and NOT have an icon in Control Panel for a specific sound brand where you can do the same thing.

Unless the instructions for installing a device tell you otherwise......
(this ALWAYS applies to sound adapter software.....) .
You DO NOT install drivers for a device while booting into Windows, if the software for the device has not been installed yet - when Windows detects a generic device or New Hardware while booting, you allow it to search for drivers, it doesn't find any, and it wants you to show it the location of the drivers - CANCEL that, continue on to the desktop, and install the software for the device using the proper installation from a CD or the proper installation file that you downloaded from the web.

The same applies no matter when Windows finds New Hardware !

(The following also applies if you want to re-install the sound software)

If you DID install drivers that way, go to Control Panel - Classic View - Programs and Features and Un-install the software you installed, reboot, DO NOT install drivers while booting.

If there was nothing to Un-install there, or on any case, look in Device Manager (reboot at least once first if there was something to Un-install there) , and if the sound device is still listed, RIGHT click on it and Un-install it (that may take a while).
If it was still listed in Device manager, reboot at least once after you have un-installed it.
DO NOT install drivers while booting, and then install the sound software the right way !

Where is Device Manager in Vista and Windows 7 ?

Double click on the Computer icon, click on System properties in the top bar, Device Manager is on the left.

Do speakers or headphones plugged into a port on the BACK of the computer have sound on both sides ? If they do, there's nothing wrong with the sound settings in Windows.

It's extremely unlikely two sound adapters would be defective on one side.

A sound adapter is NOT a CARD unless it's chipset is on a physical board that plugs into a slot on the mboard inside the computer caseand can be removed. Onboard sound - a sound adapter built into the mboard - is NOT a CARD. A USB sound adapter is NOT a CARD.
The same applies to other adapters that are built into the mboard - video, network, etc. adapters.

If you're plugging headphones or speakers into a jack on the computer case, there may be a wire disconnected or broken off inside the case between the jack and the header it connects to on the mboard, or the wire may be connected to the wrong place on the header if one side has never worked with headphones.

The wiring cables for headphones can be quite small and easily damaged. It's quite common for headphones (and keyboard, and mice, etc.) individual wires to get broken inside their cables yet the wire's insulation is not broken - in that case, the one side may work sometimes when the cable near where it enters it is in some positions, and not work when the cable is in other positions.
However, it sounds like you may have tried the headphones in another computer, or in a sound port on the BACK of your computer case, and ruled that out.

Windows 95 and up supports you installing more than one sound adapter, but only one of them can be used at any one time. Whatever sound adapter you installed the software for last becomes the default sound adapter.
If you want to change which sound adapter is being used....
Control Panel - (Classic View) - Sound
RIGHT click on the speaker icon in your Taskbar bar bottom right on your desktop screen - it may be hidden; if so, click on the < at the left end of the icons there to reveal it - choose Audio Devices (that takes you to the Sound window too)

On the Playback or Recording window, the device with the green checkmark is the default sound device been used at that time. RIGHT click on any device that does NOT have that checkmark and choose Set as Default device, to change which device is the default device. Click on OK at the bottom of the Sound window to Save the setting.

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