Power lite started blinking, i unplugged and waited a bit and plugged back in. Now no lite at all, nothing. Is it dead?

you might need to change the battery, you can order them. here is amazons http://www.amazon.com/s?ie=UTF8&page=1&rh=i%3Aaps%2Ck%3Aps3%20controller%20battery

what is indicated below the blinking lite...if your not getting a signal...try unplugging the units power...wait 4-5 minutes and plug it back in and see if it resets itself....phillip

Remove the back and check for bulged electrolytic caps on the power supply, or replace power supplu. You can go to www.partstore, for anew supply.

Power supply board is dead.Replaced the power supply board,Ur tv will get the power back.Tries Shopjimmy.com,Ebay.com to buy a refurbish power supply board for replacement.

how many times is the power light blinking as thats a error code. 3 blinks is the most famous which means convergence circuit failure.

If the power led blinks its an error code such as 3 blinks means convergence failure which is the most common error for your model.Let me know the error code and I will assist you with what you need to do.

You can do quite a bit to narrow things down....

First thing, unplug the set and wait 10 minutes. Then plug it in and watch the green power LED. If it does nothing push the power button and watch the power LED. If the set doesn't respond hold down the MENU and INPUT buttons on the front of the set until the LED starts blinking. If it blinks at this time count the blinks and then repost.

Try this: Unplug your computer from electricity, remove battery, then, press and hold the power button for about 30 to 60 seconds, leave battery out connect to power then, try to restart
Let me know if it works.

good luck

make sure tv not in standby mode

That is because either you screen is dead(test by connecting a exteral monitor) or you motherboard is dead and I have been seeing many dead motherboards as of late