3 blinks means the Tv thinks the lamp door is not put on securely. There is a tiny switch inside the Tv that a tab on the door has to make contact with. If the door is not completely installed (make sure the slider is engaged), or if the tab on the lamp door is broken, or if the lever on the switch inside the Tv is broken, then the Tv thinks the door is open and it will not turn on then blink 3 times.
Inspect the lamp door very carefully. Inspect the door switch very carefully. Make sure when you are putting the door on that they make contact with each other. Make sure you are able to move the slider on the door to make contact with the switch.
If the door or the tab on the door is the problem then replace the lamp door:Buy KDF55WF655 lamp Door here
If the switch inside the Tv is the problem then that is way more complicated. The entire Tv needs to be completely taken apart and the switch has to be replaced. A repair shop should be consulted. If you cannot do this type of repair then you can find a local repair shop by entering your info here:Find you local repair shop
Hopefully there is an easy fix, and at least you are now informed of your choices. Keep in mind that the information I just gave you normally costs $99-$129 from a repair shop (and they will never give you the DIY option).
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