Ok, we need to check some voltages on a certain plug in your TV set. The most critical one is labled the SW Power, which is the on/off switch to turn the rest of the TV set on.
But for that to actually work, it needs to have a constant 5 volts when the plug is plugged in. I think you have that since your standby power light seems to flash.
The 2nd one that's important is actually the SW inverter line which is the on/off switch for the TV screen's lamps. You can't see a picture if it doesn't turn on.
I've created a picture of your TV set with information about the one plug we need to check in the red box. It's basic, gives you an idea on what we want to check (yellow highlights) and tells you how to figure out if the ODD numbered pins are on the bottom of the plug or the even numbered pins are on the bottom. It's a dual inline plug with all odd numbered pins on one side and the even numbered pins on the opposite side.
If you have a DIGITAL camera, Pictures are more informative than words are.
This second picture is a good example. Notice the white triangle by the plug? That points to pin 1 and the one above it is pin 2. Odd on bottom, even pins on top. and that list with the arrow to the right of it tells you which pin numbers have which voltages on it.
That's not your plug, that's an EXAMPLE plug that I got a picture of on another customer's TV set. He had the same problem as yours does.