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you have a HDMI port Failure that's not uncommon many people fail to turn the units off before switching cables around it only takes a momentary short on the 5 volt line to one of the other lines and it can short it . or it may just be a normal failure . but you would have to change the .with the AV and HDMI ports on it to restore operation . your set probably has more then one port ? have you tried the others . by process of elimination you have ruled out its the game and cables so it points back to the tv
I just had the same issue and I believe it was because the sound bar was turned off. The solution was turning on all of my connected equipment such as my sound bar, cable box, tv, blu-ray player, and internet router. It stopped "disconnecting" after only 30 secs of being turned on. I think it was because my husband connected it to all those things in some way so the settings are set to work with those pieces of equipment. With one powered off, in my case the sound bar, the signal can't run full circle and reads as if cut off. Please excuse my nontechnical terminology.
Check all the signal cables at the backside of your Vizio for firmness. If there is any loose or bad cable connection, especialy with HDMI; will poise this problem. Check the input selection also. If improper input selection is done, there will be no signal logo will fly around.If you have selected TV instead of HDMI, when HDMI is connected and you want to see the programme, is an example of improper signal selection. Check these. OK.
Check your inputs. The no signal box means exactly that - there's no incoming signal for the TV to decode. So you've either disconnected a cable somewhere or turned off your input device.
Try changing the inputs on the TV (this will be a button saying input or A/V)
Try changing the channels
Check that your cables are correctly connected and that whatever you are trying to use (dvd player, PS3, etc) is turned on.
Check that your TV is tuned to the corresponding input it is plugged in to (if you plugged your DVD player into HDMI input 8, tune your TV to input 8)
Hope this helps.
U have a signal word bound around or said no signal in ur LCD Screen?Than it ur colax cable not getting signal comming in.Try reset ur cable or satalite box by turning it off/on.IF the LCD screen totally black,try unplug,replug might get picture back.Not than must replaced the main video backlight board it dead must be replaced.
check settings on your source...make sure you are not plugging into a DVI/HDMI port on your TV unless you are in fact converting from DVI to HDMI (there a connector to buy) if thats not it replace the cable with a different one. There are several varities of HDMI cable and the signal is faster as you increase in price normally. I have Monster cables that work Perfectly....I would also check TV settings on the port you are plugging into and try a different one to see if the result is the same. If the result is the same you may have a bad source. Always rule out the cable too.
WHAT HAPPENS WHEN YOU USE A DVD INPUT (AV) OR A SAT/CABLE BOX CONNECTED TO THE AV INPUT'S ,,IF IT CLEARS UP YOU HAVE A SIGNAL BOARD BAD BUUUUUUT YOU CAN BYPASS THAT BOARD AND SAVE MONEY JUST BY USING THE AV INPUT...TUNICA
your tv has a vertical problem take it to a tech to have them look at it probably on transporting the set to your house it bump around.a look on lose solder could be the problem this could be verified by a tech.good luck.you need the repairman.