Panasonic TV problems.?

I have an older Panasonic TV, model number PT-52LCX66. I turned on the TV this morning and was working great put in a new movie for my children to watch and left the room to get lunch ready came back in the room while my children were eating and the screen was black no sound and TV was blinking red, didn t really think much of it so I didn t bother counting the blinks. ( I assumed maybe the kids turned it off and back on as it generally blinks a few times before it comes on) after the blinks tv shut off I hit the power button and the red light came on and stayed on no blinking nothing. Hit the power button again and red light still there TV would not do anything. I unplugged the TV let it sit about 30 minutes and plug it back in and now nothing what so ever no lights no blinking nothing.

I got this TV from a friend a few months back and replaced the blub back in may and since have had no problems with it, and there were never any problems besides the bulb that I am aware of, but don t wish to spend a lot to fix it, but if reasonable I will, but not really good at TV repair, or repair of electronics in general but do know a little bit here and there. So basic repair I can do.

My question is what could be the source?