Display indicator lights on the bottom of the tv look like this below… Press the button again on the remote and hold. I have 2 Dell 17' LCD screens that goes off (blank) after 1 or 2 seconds. The battery indicator ALSO works when you unplug it from the cord while it's on. Our A/V receiver ( this one to be exact) has over the last few days started to shut off at random without any warning or explanation.
It kind of reminds me of how fluorescent lights and CFLs have a phosphor glow for a few seconds after turning them off. First unplug the AC Cord from the wall power outlet and wait for 60 seconds before reapplying power to the TV. None of the buttons on the tv will work and the remote doesn’t work either.
No other electric appliances in the apartment have done the same thing. If the motherboard is worn or damaged, the TV overheats, causing it to turn off and on by itself. Crt tv turns off by itself after few seconds