How long have you had the set for, and when did the problem occur?
Was it after a storm or power outage?
Does the standby/timer light blink continuously, or in a pattern (such as 5 blinks, pause, 5 blinks, pause, etc.)?
I bought the TV in 2007, and it just started happening yesterday. Yesterday we were able to turn the TV on, and today it's just blinking. The TV is on a surge protector, and we did have a high winds last weekend in which the power did blink once.
The light will turn on dim as the screen will flash, the light gets bright and then it all shuts off. It's taking 4 seconds for the dim green light to go bright, 4 seconds for the bright green light to shut off and about 7 seconds before the dim green light and screen flash happens all over again. It just keep repeating it, and won't turn on.
There are basically three problems that would cause this, the Power Supply, the T-Con board, or the LCD panel itself has failed. Voltages need to be measured at the power supply outputs, using a DMM with nothing connected to it but AC Input. If the readings are proper, then the other boards need to be connected one at a time, until one causes the voltage to shut down at the output. If the supply outputs power with all of the boards connected, then the T-Con needs to be tested. The T-Con will run you around $300 to have replaced. If the T-Con tests good, then the LCD Panel has failed and will cost you more than a new TV (around $800) to have replaced and it is not cost effective to repair this set.
If you do not have experience testing live voltages on a circuit board level, then I would suggest using the link below to locate a tech in your area:
If you need further assistance, let me know.
This does indicate that the TV is special:-)
In all seriousness, what you have is an intermittent failure on the TV, I've seen this many times. The set will start to have the problem more and more frequently, and eventually will not power up at all.
The most likely cause if the power supply, (as failing capacitors in this circuit will cause the behavior you're having, and can sometimes be "reset" until they ail completely).