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Joe
Joe, Technician
Category: Home Theater-Stereo
Satisfied Customers: 7136
Experience:  connections and repair diagnosis of home theater
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I have direct tv and just purchased vizio speaker system>

Customer Question

I have direct tv and just purchased vizio speaker system> The sound bar works but the rear speakers do not.
JA: Sometimes things that you think will be really complicated end up being easy to fix. The Home Theater Technician I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so he can help you best.
Customer: no sound from vizio speakers-only sound bar
JA: Is there anything else important you think the Home Theater Technician should know?
Customer: no
JA: I'm sending you to a secure page on JustAnswer so you can place the $5 fully refundable deposit now. While you're filling out that form, I'll tell the Home Theater Technician about your situation and connect you two.
Submitted: 8 months ago.
Category: Home Theater-Stereo
Expert:  Jack replied 8 months ago.

Hi , I`m Jack
Perhaps I can help you with this problem , please send me a reply when you see this ?

When you say rear speaker , do you mean the sub woofer ?
I would also require the bar`s model number please ?

Customer: replied 8 months ago.
satellite speakers rear VIZIO SB3851-C0 38-Inch 5.1 Channel Sound Bar with Wireless Subwoofer and Satellite Speakers (2015 Model)
Customer: replied 8 months ago.
subwoofer and sound bar work- the test says they're working, but they aren't-
Expert:  Jack replied 8 months ago.

O.k and right now only the rear speakers do not work ?

Customer: replied 8 months ago.
correct
Expert:  Jack replied 8 months ago.

give me a few minutes please

Expert:  Jack replied 8 months ago.

Sorry this takes a while , the vizio website is finicky when it comes to manual .

I only have the quick start manual now and this may have to do with the sound mode.

One question on this though ;

Where did you connect the bar ?

At the back of the TV's optical port ?

Customer: replied 8 months ago.
bar connected to the TV's optical port
Expert:  Jack replied 8 months ago.

O.k then that is 2 channels PCM at best , not surround .

Can you try it at the back of the direct tv box (receiver) ?

Customer: replied 8 months ago.
I did and I used the RCA cables
Expert:  Jack replied 8 months ago.

That box should have either an optical or coaxial digital and that will be surround , can you look ?

Customer: replied 8 months ago.
the satellite box?
Expert:  Jack replied 8 months ago.

receiver as I indicated above

Can you try it at the back of the direct tv box (receiver) ?

Customer: replied 8 months ago.
the direct tv box only has coaxial and rca cable, no optical
Expert:  Jack replied 8 months ago.

Your sound bar has coaxial input and it uses a standard rca type cable

Expert:  Jack replied 8 months ago.

Normally for the best setup you would connect your direct tv box hdmi into the sound bar and from there hdmi out to the tv , that would be the best sound and you could see the sound bar menu on the tv screen

Customer: replied 8 months ago.
there is no hdmi output on the sound bar
Expert:  Jack replied 8 months ago.

Yes there is one IN and one OUT look again

Expert:  Jack replied 8 months ago.

click the link here and close the popup if there is one , a picture behind that ;

https://www.dropbox.com/s/393a97n30kb6mpe/2016-03-25_1129.png?dl=0

Customer: replied 8 months ago.
cable box does not have hdmi.. it is an older box
Expert:  Jack replied 8 months ago.

what you need to do now is turn the surround mode on and connecting to a surround source VS a 2 channel source may just do that

Expert:  Jack replied 8 months ago.

Try the coaxial cable then

Customer: replied 8 months ago.
didn't work
Expert:  Jack replied 8 months ago.

I have 2 pictures for you ;

This one is for surround speakers level

https://www.dropbox.com/s/y5ubrihwcnr96g4/2016-03-25_1134.png?dl=0

And this one to turn on/off surround;

https://www.dropbox.com/s/xlvaf6zd7fz9x8v/2016-03-25_1135.png?dl=0

Expert:  Jack replied 8 months ago.

Do you get sound at all with the coaxial ?

Expert:  Jack replied 8 months ago.

In the menu you also have " Spkr Test " , speaker test , try it

Press the Play/Pause button to activate the speaker test function. A voice will

begin calling out each speaker beginning with left front. (Left Front, Center, Right

Front, Right Rear, Left Rear, and Subwoofer-white noise) If any of these are

missing, check the connection and run the speaker test function again.

Expert:  Jack replied 8 months ago.

Now if the speaker test fails and your speakers are connected correctly then something is wrong with the bar , that test does not take surround into account , it tests all speakers

Let me know how that goes

Customer: replied 8 months ago.
the speaker test worked-but the speakers themselves are not working
Expert:  Jack replied 8 months ago.

O.k then do you get sound at all with the coaxial ?

Did you turn on the surround mode and adjust the surround speakers level ??

Customer: replied 8 months ago.
on trusound bar there is no coaxial
Expert:  Jack replied 8 months ago.

On your sound bar there are hdmi, optical , coaxial and analog inputs

Expert:  Jack replied 8 months ago.

just want to make sure here about what you said above about the test working but not the speakers , did you mean that you did no hear the rear speakers during the test ??

Customer: replied 8 months ago.
the rear speakers did talk during test, just not otherwise
Expert:  Jack replied 8 months ago.

You said above that the coaxial did not work when I asked you to try it then later that there was no coaxial input on the bar ???

If you`re not going to try honestly what I suggest then this is not going to work and I`m opting out .

Expert:  Joe replied 8 months ago.

Hello,

Thank you for allowing me to assist you, my name is Joe and I will be happy to assist you with your concern today.

The model number you provided does not have an hdmi in or out as you suspected. You can simply use the optical out from your tv to the sound bar just like you were to begin with. Set tv mode to external speakers. The fact that the rear speakers work during test means they are correctly connected.

Make sure dts trusurround is turned on.

If surround is turned to off you will only have 3.1 and no surrounds, make sure surround is turned to on.

On this device/model any input source will reproduce to virtual 5.1 meaning digital or analog it will convert audio to play from all speakers so long as surround is set to on and dts trusurround is on.

Thank you!
- Joe

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