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Hello and sorry you're having problems.
In order to determine what's caused this, I need some more info:
1) What is the model number off of the back of the set?
2) Are there currently ANY signs of life on the Vizio at all (power light lit or blinking, etc.)?
Let me know when you are able to see my reply please.
Do you need assistance with the question you posted?
Okay. Are there currently ANY signs of life on the Vizio at all (power light lit or blinking, etc.)?
You're asking about a fuse, but I don't know what the set is doing or not doing?
The TV does have a fuse- located inside of the set on the power supply board. However this would only be the case if the TV has no signs of life at all (no power light- as if the set were unplugged). That's why I'm asking to save you from removing the back of the set in vain. If you would like help, simply reply back with more details as I'm not there to see what you're seeing.