We have had this tv for just under a year and when I went upstairs to use it, it wouldn't turn on...it tries but when you push the button the green light turns on then a second later it turns off and the red standby light stays on.
Most common problem is a ruptured capacitor on the main power pcb. It can be seen as ruptured if you know where to look. It has to be replaced with a special type of capacitor or it will quickly fail again. If its less than a year old it is still on parts warranty.
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Needs the button put back into place. Look under the cabinet to see if there is an access panel below the switch, would go for all external controls. There would be a chassis with all the controls mounted to it. Pull the plug before doing any repairs. Look to see what it would look like in it's normal position. Something has moved out of place that holds the switch to the panel. Very tedious if you have to remove the whole housing.
3 blinks means the convergence circuits are shutting the set down. Usually the convergence ICs will take care of the problem, but I would recommend getting the service manual from the following link, as they will provide you free support to help you diagnose why it wont start as usually the convergence ICs wont prevent a set from powering up, unless another component in the convergence circuit has failed. http://servicemanuals.vstore.ca/