Power led on, sunpak screen come up for 4 seconds, then screen goes out

I think an LED problem is more likely. The LED strips are usually powered by a driver circuit on the power supply board. You can check this with a bright flashlight shining on the front of the display at about a 20° angle from parallel to the display. If you can see the picture or the menu with the flashlight beam during the "dark" period, the problem is NOT likely to be the T-Con board.

You can also look at the back of the set with the cover removed - most sets have a number of vent holes in the back plate through which the backlight can be seen when it is on. If these holes go dark when the TV goes black, the backlight is being turned off.

When the screen is lit, take a picture quickly and look for dark spots. Maybe one of the LEDs has a partial short that shuts down the LED power and triggers a retry cycle. If so, after a while it will burn out and then the entire LED strip will be inoperative.

Hello !! first of all check for bad connection on the led strips if all connection ok , test the single led one by one , at the end Do not Hesitate replace the leds strips . Because problem could happen after heating .

chip failure

Change the power socket its plugged in to.. if that doesnt help maybe you use it too much and it overheats so it cuts.

Power supply board is dead,replaced the power supply board will get power.

blinking red mean there is problem on one of the boards. it s a computer so it is stopping it to keep it from burning something up the 2-4 seconds is a system check.

It sounds like a faulty battery. As it is under 1 year old, it is still under warranty. Return it to the origional place of purcase, who will either fix or replace it.

"Most" newer monitors will let you know if the are no longer receiving a signal. Sounds like the backlight is burnt out. Try getting a bright (LED works best) flashlight and shining it at the screen at all angles to see if you can see any of what you were doing. If the backlight is on the fritz, either return it on warranty or buy a new one.

Try cleaning that front flash sensor.

Alexander
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