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It sounds like you have taken the steps to isolate the problem to the TV. it seems to be a bad tuner on the Main board. The no signal displayed indicates the TV is otherwise okay. If you have a DVD player or other source you can connect, and you get a picture, then your TV has a bad tuner for sure.
If it shows "No Signal" it means it. It do not get any signal to display. Check all the settings. Refer its user manual for details. First, try to tune it to on-air program, by do an auto-tune function, after connecting it to an external antenna. Refer its user manual for more details. If it do receive all the channels transmitted, means, the set is OK, and the fault will be with the input selection, you've done. OK? Gopakumar Gopalan Google
Tries tv unplug,replug it back like about an hour later for the tv resetting itself back to the factory setting.Tries again,tv should be working.If still getting no power at all than the tv Tuner board is dead,because pictures freezing and dies completely is the causes so it is not power supply board problems.The tv Tuner signal board is the causes,that the board where the incomming broadcasting signal cable plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish tv Tuner signal board for the replacement.
The tv have problems with it Tuner incomming Signal board,it have dead componnents on it board.Call for warrenty repair,it the Tuner board it dead.Or return where u purchase it,get a new tv for the replacement.
your television is displaying a blue screen or no signal message and
then turning off, your TV may be at an inactive input. Here's how you
can get back to watching your TV: 1. Powering on your
TV and press the INPUT button on the VIZIO remote control repeatedly
until a picture re-appears. 2. If this does not work, try again but press the button slower this time.
Me too! Apparently Diboss are no longer trading, so no help there. I am aware that these panels have a common power supply issue, the faulty chip is only available from China and the last one I fitted only lastest a couple of days. However the fault described above is not the same. I've checked the psu outputs; all are fine and nothing changes when the picture disappears, therefore I can assume that I'm not looking at a PSU fault. As Iain says above, it appears to be a signal link, however I have no picture on ANY input and without circuit diagrams I cannot find any component that's common to all the various inputs. This leads me to think that either the backlight, or the screen itself is faulty. I'll keep trying and if I get it sorted I will report back.
Un plug the power to the Plasma Screen and also to the Media Receiver for ten minutes. Disconnect the off the air antennas both A and B. After ten minutes plug in the plasma screen then the media receiver and turn on wi the remote control. You should now be back in operation. I was.
Also It may not be a bad digital tuner. The TV Guide feature is active even when the zip code is set to all 0s so if you have an over the air antenna attached the TV will look for the TV Guide info and if it can not find it because of a weak signal or the chanel it is tuned to does not carry that information the TV thinks that tuner does not work which triggers the 12 flashes. Also on power up the gray box with the waring message "Plasma Display Starting Up, Please Wait" appears and the screen is blank.