Question about Vizio 42 in. LCD TV

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After turning on the 42" Vizio, the sound turns off

The sound lasts about 10 seconds when first turned on, we have only had it 1 week. We have to turn the tv off and then back on, which takes some time, then the sound is okay. Sometimes the tv shuts off by itself.

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  • mdncn Dec 07, 2008

    We had Fios TV (Verizon) installed yesterday. Up to that point we were not having an issue with the TV. The tech seemed very knowledgable but the sound on the TV went to 0. He called Vizio and they said to use LG codes which fixed the problem for awhile. We unpluged the Fios box from the tv. Using the Vizio remote to get to the setup menu it bounces from the audio to visual to setup. When you press the sound it goes back and forth from 01. We only purchased this TV in August.

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  • 47 Answers

One week old? did you ever think about taking it back to the store where you bought it?? would be my first choice. unless you want a bunch of crazy answers or taking it to an authorized repair shop and waiting a few months for parts to come in and more time for the repair to take place.

Posted on Jul 10, 2009

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Posted on Jan 02, 2017

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I have a Vizio model E320Vl TV. after working for about two hours it shuts off. You can unplug it and wait about 10 minutes and it turns back on but will shut off again after awhile.


Sounds like 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://electro-medical.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.

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Do a reset to this TV. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

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TV turns on fine but turns off in 5 to 10 mins


Yes, this normal, by the lack of detail shown in your question. Once you press any key it should come back on unless it is set to turn it self off while in sleep mode. This is to protect the display from creating burn in setting.

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Headphone mode


Remove the headphone if its a wired one or turn of teh headset if its bluetooth. If the problem still persists then go into settings then sound and look of an option there. If you have an ipad, just turn of the airplay feature.

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