Polaroid flat screen LCD tv went out

Could be main AV board not receiving the proper voltage due to a failing capacitor or power transistor. So I suspect a PSU failure.

Check its backlight inverter board.

You may have blown power supply for the backlight inverter or blown backlight inverter board, either one are cheap!,
This is cheaply made TV to begin with. Repiar shop will charge you $200 and up plus parts.
http://www.shopjimmy.com/catalogsearch/result/index/?q=Polaroid+TDA-03211C+&limit=100&p=2

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com

Please post back what you find.

The backlight inverter board may have gone out, or the power supply for the inverter may have gone out. If it is two years old, you should look at the power supply first for bad capacitors.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find. What is themodel number anyway?

I have a 3 year old TV with the same problem as shema_ross.

Sounds like a bad capacitor on the power circuit board. best place to look

The 23" CRT set may have a high voltage breakdown in the flyback transformer or focus divider. Take the back off and operate the set in a dark room. Look for anything that has a blue glow around it or sparks flying when the pop occurs. I won't guarantee this will find your problem, but it is definitive if you see these!

I once had a set with these symptoms. I stopped the blue glow and arcing by covering the focus divider with epoxy. It worked for a couple of months before the divider literally broke apart.

This is called the pop of death! If you call vizio they will ask you if you heard a pop, this is a common issue and unless your under warrenty your looking at 916$ to fix it. (assuming you have no sound! If you do its 430$ plus tax for parts and repair. You can buy a used one on ebay for that price!

I have the parts numbers if you want them!
Call vizio if you have had this system for under a yr the will fix it free!

As for me my 50 and 42 inch had this issue and well I am out of warrenty.. I hate vizio lol!

Turn the "SAP" to off