Vizio tv mod# SV470XVT1A has good picture but no sound. Replaced the sound board but still no sound. tried all the troubleshooting steps to no avail. What could be the reason that there is no sound?

If you have replaced all the boards in your Vizio D50u-D1 TV and you are still experiencing no sound and a blue screen, it's possible that the issue lies with a different component or a configuration setting. Here are a few troubleshooting steps you can try:
1. Check the audio settings: Go into the TV's menu and verify that the audio settings are correctly configured. Make sure the volume is not muted and that the audio output is set to the appropriate option (e.g., internal speakers or external audio system).
2. Check the input source: Ensure that the correct input source is selected on the TV. Sometimes, selecting the wrong input can result in a blue screen and no sound. Use the remote or buttons on the TV to cycle through the available inputs.
3. Test with different sources: Connect different devices (such as a DVD player or game console) to the TV using different cables. This will help determine if the issue is specific to one particular source or cable.
4. Perform a factory reset: Resetting the TV to its factory settings can sometimes resolve software-related issues. Refer to the user manual or Vizio's support website for instructions on how to perform a factory reset.
5. Update firmware: Check if there are any available firmware updates for your TV model on Vizio's official website. Updating the firmware can potentially fix bugs or compatibility issues that may be causing the problem.
6. Contact customer support: If you have exhausted all the troubleshooting steps and the issue persists, it's recommended to contact Vizio's customer support or seek assistance from a qualified technician. They may be able to provide further guidance or arrange for a repair if necessary.
Remember to exercise caution when working with electronic devices and consider seeking professional help if you are not comfortable performing the troubleshooting steps yourself.

It sounds like your Vizio TV may have a backlight issue, which can be caused by a problem with the LED strips or the backlight driver board.
To determine the cause of the problem, you will need to perform some troubleshooting. Here are a few steps you can try:

1. Make sure that all of the connections between the TV and the wall outlet are secure.
2. Check the TV's backlight setting and make sure it is set to the optimal level for your viewing environment.
3. If the TV has a local dimming feature, try turning it off to see if it makes a difference.
4. Check the TV's picture settings and make sure they are optimized for your viewing environment.

If these steps don't fix the problem, you may need to replace either the LED strips or the backlight driver board. To determine which component is faulty, you will need to perform some further troubleshooting or seek the assistance of a professional.

unplug tv remove batteries from remote try reset switch on bottom of unit lower left on back

Sounds like a power board problem. Aging Cpacitors or a Resistor going out after it warms up.

Check and replace the back-light inverter baord.

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http://electronicshelponline.blogspot.com/
faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Likely a shop repair---possible power supply board or others---place to begin is test all voltages into and out of the power board.............

This is your mainboard needing replaced! Simple as that!

The main sends the pson signal and without it...you have a dead tv.


Please rate if this helped :)

Hello,

This sounds as if it could be a ballast problem, or a switching power supply transformer problem. Both of these can produce this sound. I would suggest that you have a qualified TV technician repair this set due to the dangerous voltages and currents that could be present. In my experience with these TV I would have the technician pay special attention to the power supply board and the backlight/inverter section which includes the ballast used to fire the backlight.

I hope this helps,

Thank you,


Shuttle83

http://www.electron-age-technologies-llc.com