My Samsung (TXE2546) will not power up.However it will flicker for a few seconds.It is plugged in (I tried several outlets) but will not work. A few days ago it would work,but now it will not power up.I have had it for 11 years.I have not estimated how much it would cost,but if you can,please do. It is 25 inches.I know it isn't a cable problem because I tried to use my DVD player,my wii and my cable.
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The 920nw did have a 3 year warranty on the unit but they will be out of warranty now. The flickering power light is an indication of a failure in the power supply board. When the board fails it can't start up correctly and the power shuts down over and over so you get the blinking light and no display. This is a very common failure point on all LCD monitors after a few years of use. There are parts called capacitors on the power supply board and they filter the output power. When they fail the power is not properly regulated and the power supply shuts down and tried to restart so you get the flashing. Here is a link to a repair guide that will show you how to dis-assemble the unit and then what to look for and replace to get it back up and running again.
It May be due to one of several things. You could have some bad filter capacitors that are allowing electrical "noise" to disrupt the video, or there could be a bad solder connection or crack in the circuit board allowing a ground to "float", or there could be a problem in the Degaussing circuit, although that would be my last guess. I don't recall ever having that particular problem with any sets in my shop.