Panasonic TH 46PZ80U has light blinking 10 times then repeats. Any thoughts

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. Viewing it in "Mosaic" or "Magazine" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.

had the same problem with my panasonic, it was a faulty power switch, its a common fault with them

this page will help diagnose the problem. http://www.scribd.com/doc/15964494/Plasma-Symptoms-and-Cures

Power supply or something loading it down.

Hi, I have 10 blinks. Any thoughts? Thanks

Panasonic is junk!!! Will not spend the money to buy another Panasonic again!!!

solution of light blinking

A red light blinking 10 times means that a video board has gone bad. Contact Panasonic to see if they will help you out.

You have the same problem i have. My Tv just did the same thing 3 nights ago. I unplugged the set, and let it sit ofr about 6 hours, and then tried it again. It turned on and played, but repeated the problem after about 20 or 30 minutes. So far all my research has led me to believe that its a power supply issue. Problem is, there are 5 boards in the tv with seperate pwer supplies, and the 10 red flashes indicate that its all of them. :-(. Im shopping for a new TV, and It wont be a panasonic this time.