Power light comes on but no picture or sound

"stephenbirdwell826 , First try unplugging TV for 20 min's and press and hold power button on TV for 10 sec's to reset and plug TV in and try. If no go remove the back from TV and remove plugs/ cables reseat them to make sure all have good connection and try TV again. At any time if you start getting light blink codes, use the 2nd link to diagnose the fault.

Could be possible power supply board issue, remove the back off of TV and look for any evidence of a power surge, bulged capacitor, hot/burn marks, etc., replace parts on the board or replace board found with defective parts. Check out the 1st link below for more info. on diagnosing a TV with this type of issue. If not comfortable working on the TV, have a good local TV repairman have a look, diagnose and estimate repair. Good luck.

I hope this helped you out, if so let me know by pressing the helpful button.

https://www.youtube.com/watch?v=iHBIiRxh...

http://www.brainchamber.com/2016/03/23/p..."

Basically all you want to do is go over to the TV power button that's on the TV and after turning it off using the button turn it back on but instead of releasing hold down that button after about thirty seconds the TV should turn back on again this is only if you're having the same problem as me which is where your TV has gone black but your power light is green and flickering or just staying solid otherwise I guess try the other methods that have been given to you but other people on this website

Try pressing the ‘i’ button on the remote’s number keypad . There is a ‘self check’ feature that activates if the blank screen and no sound is a settings problem. After that, press the tv/av button on the top of the set to get your tuner back on screen. Thereafter, to avoid having to repeat this every time you use the TV, just unplug it rather than turning it off by remote (- switching off by remote seems to trigger the problem that puts all picture and sound settings to zero one-by-one.)