Vizio sv320xvt mainboard not sending +5 to t-con

Try a Hard Reset first.

Note: To perform a hard reset on a Vizio Smart TV, you will need to use the remote.

1. Unplug your router.
2. Press the menu button on your Vizio remote.
3. Navigate to System on the menu and select OK.
4. Select Reset & Admin and select OK.
5. Select Reset TV to Factory Defaults and select OK.

More items...
•
Mar 19, 2022

How to Hard Factory Reset a Vizio Smart TV - Alphr

Hard Reset VIZIO TV E60-C3, how to - HardReset.info

https://www.hardreset.info > devices > vizio-e60-c3
In the first place, you need to turn on your VIZIO E60-C3 TV. · Once the TV turns on, press the Menu button on the remote. · Now the Menu should appear on the ...

..

I would fault find the power supply.

The model(s) that use this T-con board have a history of LED panel failure. If this board does not fix the TV, it's likely that the TV has a bad panel/screen.

Chances are your T-con may be bad . I would check the backlight by shining a flashlight by the screen to look for an image on the screen . If an image is present, then the backlight is the problem. Your Tcon and main board could be ruled out, if this is the case . At this point check the power board for voltage to the led driver. The leds could have issues.

Could be the main or t-con

The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Hi Tim,
If all the boards you replaced were good and working, the only thing remains is the panel if the backlights are on. Please see that the LVDS cable is carrying voltage to the Tcon board.
Good luck.

Yes its very repairable as long as the logo stays white you can assume the main boards good. I would recomend contacting the people at www.tvrepairworld.com by hitting the contact us button from their website. They will be able to assist you in finding out whats happening with the set for free. They have most parts available as well.

Have you tried the T-con board?

Thank you,

check if the fuse is blow on the t-con board and there are 2 or 3 fuse on the main board 1 feeds the voltage to the t-con