I have an LG Flatron Plasma...it turns on, the light comes on and tries?

I have an LG Flatron Plasma...it turns on, the light comes on and tries to connect the screen. It seams to cycle through a few try and within about 5 second the blue light goes red. No picture at all. What part do you think needs replacing?

Make: LG Flatron Plazma
Model: MU-42PZ41V
It is about 8 years old.

Seamed to be working fine and then it just didnt come on...it tries to engage, but reverts back to a red light after 5 seconds.