No sound from my speakers

What are you using that is muted?

Please elobrate further your problem.. i'm a bit confuse " If I press mute button it goes to mute,press mute again sound will come back on" This is normal.i.e. that is the function of mute button.

The sound is MUTED. Press the MUTE button on remote to UN-MUTE.

Did you press one of the speaker buttons?
Did your cat chew the speaker cords?
Pressed the mute button?
Turne the volume low before pressing any button.

Hi,

You can use the function button in your keyboard + Mute sound button in the top keyboard rows to mute and unmute the sounds.

(fn key + Mute symbol key)

I hope this is helpful to you.
Thanks

The OSD consists of several menu options: Picture Adjust, Audio Adjust, TV Tuner Setup, Parental Controls,PIP Set Up, or Special Features. When in the TV menu, select the Audio Adjust and make sure the mute is off. It may be worth checking the manual which is avialble from: http://www.vizio.com/downloads.aspx

Try looking for the the speaker in the lower-right corner. Single-left-click on it, and unselect "Mute". It might either be a speaker with a no-sign or the word "mute" with a checkmark next to it.

check your interconnection cables-check volume control not in low level-no mute button or switch is pressed-check your input selector for right selection.-if you have speaker button confirm it is pressed.

First try resetting the unit. If that don't work try this:

Press and hold the SETUP button for at least 3
seconds.

2 Press the UP button repeatedly to select
“mute”.

Each press of the UP button changes the
modes as shown:

NOTE
If you press the DN button the display scrolls in
reverse sequence.

3 Press the TUNE button to toggle the mode
between MUTE ON and MUTE OFF

4 Press the SETUP button to set the selected
mode.

→ NORMAL/HI-FI → AMBER* → DIM → SUB
DEMO ← AUX ← SCR ← MUTE ←BEEP ←

Well, it sounds like you need a new output IC, which is what produces sound to the speakers.