I saw this on the Nintendo site.
Image Retention Warning Nintendo home consoles will work just fine with most standard televisions. However, we have some precautions when using video game systems with other types of TVs.
Projection TVs: (the following is from the Precautions Manual that comes with each Nintendo system)
Do not use a Front or Rear Projection Television with your Nintendo system or games. Your projection television screen may be permanently damaged if video games with stationary scenes or patterns are played on your projection television. Similar damage may occur if you place a video game on hold or pause. If you use your projection television with any Nintendo system or games, neither Nintendo nor any of Nintendo's licensees will be liable for any damage. This situation is not caused by a defect in any of the above listed systems or games; other fixed or repetitive images may cause similar damage to a projection television. Please contact your TV manufacturer for further information.
HDTVs: Nintendo systems can be connected to standard (tube) HDTV's; however, they should not be connected to projection style HDTV's. Projection style HDTV's display the image in much the same manner as a standard projection TV and as such the same warning as above applies.
Plasma TVs: We have no information on Plasma TVs. Since image retention is a variable of the TV, please check your TV manual or contact the manufacturer directly before connecting any videogame system to your television.
I was wondering if you have your brightness and contast turned down, if this is still a danger?
Image Retention Warning Nintendo home consoles will work just fine with most standard televisions. However, we have some precautions when using video game systems with other types of TVs.
Projection TVs: (the following is from the Precautions Manual that comes with each Nintendo system)
Do not use a Front or Rear Projection Television with your Nintendo system or games. Your projection television screen may be permanently damaged if video games with stationary scenes or patterns are played on your projection television. Similar damage may occur if you place a video game on hold or pause. If you use your projection television with any Nintendo system or games, neither Nintendo nor any of Nintendo's licensees will be liable for any damage. This situation is not caused by a defect in any of the above listed systems or games; other fixed or repetitive images may cause similar damage to a projection television. Please contact your TV manufacturer for further information.
HDTVs: Nintendo systems can be connected to standard (tube) HDTV's; however, they should not be connected to projection style HDTV's. Projection style HDTV's display the image in much the same manner as a standard projection TV and as such the same warning as above applies.
Plasma TVs: We have no information on Plasma TVs. Since image retention is a variable of the TV, please check your TV manual or contact the manufacturer directly before connecting any videogame system to your television.
I was wondering if you have your brightness and contast turned down, if this is still a danger?