My Panasonic TH-42PZ80U has a blinking light. It blinks two times.

Generally a two blink code means a faulty power supply. You can buy a replacement power supply online. I've seen them as low as around $120. I'm doing factual research for a potential class action lawsuit regarding these blinking light problems, so I'm pretty familiar with this stuff now. From most of the complaints I've seen people post, if you have a tech replace the power supply it usually costs between $450-$600 including the tech's labor time.
I'd like to hear more about your personal experience with the television. If you would be willing to share your story with me, please send me an email at [email protected].