After image retention ( transient) and burn in ( permanent) result from uneven phosphor wear. Plasmas are most sensitive to this in the first 100 or so hours of use historically ( I cannot tell you why this is true). Keep in mind you can use a reverso image of sorts ( white bars on the side black in center) to essentially even the wear and then recalibrate using AVIA or Digital Video Essentials as an example.
In the residential setting it is quite rare, but watching 4:3 continuously will do it over time. ( if you arent using a plasma for movies maybe an LCD would suffice).
I have had mine for 5 years as of March 2008 and its the same as day one as far as I can tell and I do watch letterboxed movies on occasion and my plasma is almost always in the full mode. ( I also recalibrate with DVE on occasion and almost never change anything including picture/brightness levels interestingly).
A surge protector and power conditioner may not prevent the brownout-then on spike damage, as noted above; it wont trip anything. A more global solution for the house might make some sense.
In the residential setting it is quite rare, but watching 4:3 continuously will do it over time. ( if you arent using a plasma for movies maybe an LCD would suffice).
I have had mine for 5 years as of March 2008 and its the same as day one as far as I can tell and I do watch letterboxed movies on occasion and my plasma is almost always in the full mode. ( I also recalibrate with DVE on occasion and almost never change anything including picture/brightness levels interestingly).
A surge protector and power conditioner may not prevent the brownout-then on spike damage, as noted above; it wont trip anything. A more global solution for the house might make some sense.