Have TV Questions? Ask a TV Technician
Hello, Sorry you're having problems. I need to ask for some more info to sort this.
1) Can you get the full model number off of the back of the Vizio if possible?
2) How long does the TV stay ON for before shutting off?
3) When did this issue occur- were there any storms, power outages, etc. prior to this?
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How long does the set stay on for before shutting down please?
Please just stay on this page and it updates as we both respond. I posted a reply a minute ago- here it is:
Also, does it physically shut OFF (power light changes) or do you simply lose picture and/or sound?
Okay, unfortunately this usually points to a failure of the Mainboard in the TV, which is what processes the external AV signals in the set.
However it's worth it to try a hard reset, as sometimes the processor in the TV can simply have locked up.
The first thing you would try, is disconnect the set from power, then press and hold the power button on the TV itself (not the remote), for 10 seconds and release. Then plug the set back in, and also check that the power cord is connected tight at the TV as well. Press power once, and see if the set powers up normally (and stays ON). Try this procedure up to 3 times, and please let me know what happens.
Does the Vizio welcome logo display on the set when you turn it on?
Okay, that is bad news and indicates a hardware failure in the TV. Aside from trying to leave the set unplugged for several hours or more, there aren't any quick fixes for this and it does require service. If you're a DIY type and have a multi-meter then we can run through some voltage checks to determine if the mainboard or the power board are causing the issue. Alternatively if you don't have tools but still want to repair yourself, then the two possible boards that can cause this are available for purchase at the link below for your set:
These are both plug and play boards- meaning no soldering is needed.
Alternatively if this is not something you're comfortable with then a shop will charge close to $350 parts and labor for this repair and can be located at the link below:
Other than that, I'm sorry for the bad news and wish there were a quick fix.
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