Re: Vizio XVT473SV Back Light On, Sound On, No display

I replaced the Main Board and it works like a charm.


I replaced the T-panel at first but that did not work.

Re: Vizio XVT473SV Back Light On, Sound On, No display

So I replaced the T-Con board and the TV worked for about 5 minutes (as it did before replacing the t-con board. I am back in the same place. Could it be anything else but the main board at this point?

Re: Vizio XVT473SV Back Light On, Sound On, No display

I believe I get the correct voltage from the power supply. I am able to read 12 and 5 volts in multiple spots on the boards.

Re: Vizio XVT473SV Back Light On, Sound On, No display

I did not hear the squealing sound since the first time it died, it was almost like a click / squeal as the screen flickered.

I tried powering it on with just one of the top cables / flipped it and the same thing occurs. Screen is bright (no vizio boot logo) and then it gets slightly darker.

Re: Vizio XVT473SV Back Light On, Sound On, No display

Fired up the TV today to check it out and I got it to work...for about 5 minutes. The back light is still working (that means the inverter is good, right?).

When I take the power cable feeding into the t con board out, the screen does get lighter
Trying to figure out what board I need to replace. I feel like it is related to the Tcon board (or the main board output into it) but I want to be sure before purchasing it.

Re: Vizio XVT473SV Back Light On, Sound On, No display

I am getting voltage out of the T con board into the LCD panel. Does this mean it isn't the tcon board?

Was watching my Vizio XVT473SV when the screen began to flicker and make a high pitched chirping noise. It looked a lot like interference with a signal (from the old analog days) and the brightness of the screen fluctuated quickly. This happened for about 3-5 seconds over the course of 30 minutes in which I finally turned the TV off.

When I turn the TV back on, the VIZIO logo turns on, the screen goes through its normal boot cycle, and then it darkens slightly. I can hear the sound of the input and can tell the remote is working (can hear channels change and can power on and off the...

Re: New Members - please post your introductions here

Found this forum while trying to repair my TV! Hoping some of your pros can help!