On my unit, 100 hrs break-in using freeTV channel 7 or 2, max zoom to crop out logos, 10 hrs per day for 10 days.
After break-in, normal DVD viewing na. After 8 months of regular use, no burn in or IR whatsoever from black bars or station logos or anything else. I sometimes check with an all-white screen using the free plasma break-in DVD downloaded from:
http://www.eaprogramming.com/downloads/download_main.htmFrom the author:
It is basically a set of 20 images that are 720p native resolution. The images are full screen colors so that the entire screen is 1 color at a time. The colors go from a white to a dark grey in 5 gradients, white to blue in 5 gradients, white to green in 5 gradients and white to red in five gradients.