Lcd tv dim and emitting high frequency noise

SOURCE: totally dead. Vizio GV42L

If the circuit breaker was tripped, more likely the fuse inside the TV power supply might also be blown. If that is the case there might be a short circuit in the power supply components, more likely on a diode or transistor/mosfet.
Contact these website to see if they have the parts for your plasma.
Good Luck.

SOURCE: power

The reason the tv is turning itself off, because most TVs have a "Protection Mode" that turns the unit off when it detects a failed part inside the tv.
The most likely the tv has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
Being that the TV is under a year old, it should be still under manufacture warranty. Last thing you want do is void the warranty by opening up the TV. Here's some info to get you started on the warranty:
http://www.vizio.com/support.aspx?id=1588

If it not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

Jacques Marin

• 566 Answers
• Posted on Feb 01, 2010

SOURCE: I have a Vizio 37 inch lcd tv. It works fine from

Hi msyaros
In order to have data`s specific to model , i would need the model# written on the back of the tv set.
Be waiting for your reply

SOURCE: TV went black and emitted a high pitch sound -

i could be the power supply or the panel if its the panel you should hear a buzzing noise all ova

SOURCE: tv screen went blank

sound like the inverter circuit board problem. check & replace back same part# inverter circuit board. hopefully could help!!