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Is the light blinking twice and then pausing?
yes. 2 blinks then a pause. repeats.
Does the TV making a clicking noise when you turn it on?
The two blinks points to a malfunction of the D logic board that is not reading the 15V supply correctly.
You can order a replacement from here if you have TV repair experience and want to DIY
Please double check the board number when you remove it from your TV as they made a couple of boards for the TV depending on the date of manufacturer.
If you are not confident then a technician will be able to do the board replacement for you for an additional charge of $250 - $350