Hi guys. I am still on the fence about the burn in issue. I have MBPr that also has some slight IR. Week 41, Still within 14 days. I found info that is somewhat interesting. I looked at both manufactures sites regarding IR and both address it. What I take from both of these articles is that IR can potentially be on both models and is not defective. This seems to be one one drawback to this technology but is not defective. Check this out
Samsung
http://www.samsung.com/us/support/SupportOwnersFAQPopup.do?faq_id=FAQ00001261&fm _seq=1429
Although much less susceptible than Plasma TVs, LED TVs are still subject to screen burn in (image retention). In general, you should avoid keeping a static picture (that is, a picture that contains no or few moving elements) or a picture with static elements (black bars, black borders, logos, etc.) on your LCD TV for more than two hours at a time. If, for example, you have your TV set to 4:3, and have black borders on the top and bottom, or on the sides, changing the picture size for a minute or two every couple of hours, say during commercials or in between shows, would decrease the chance of screen burn in. Reducing the brightness and contrast of the screen when it is displaying static elements will also decrease the chance of burn in.
If you are using your LED TV as a computer monitor, the same general rule holds true: Avoid keeping a static picture or a picture with static elements (black bars, black borders, logos, etc.) on your LED TV for more than two hours at a time. Make sure you change the image on your screen periodically. Also, if you intend to leave your PC unattended for long periods of time, or you leave the same image on your screen while you work on other things for extended periods of time, you should set up a screen saver that goes on after about twenty minutes, or set up your monitor so that it turns off if unattended for more than twenty minutes.
The advice above also holds true if you are using your TV to play video games. Avoid keeping a static picture or a picture with static elements (black bars, black borders, logos, etc.) on your LED TV for more than two hours at a time. Make sure you change the image on your screen periodically.
Important: Burn in damage is not covered under warranty.
Changing Picture Size If You're Watching TV For Long Periods of Time
If you are watching your LED TV for an extended period of time, and you have black bars, black borders, etc. on the screen, it is a good idea to change the size of the picture occasionally if you can.
Here's LG
http://www.lg.com/in/support/product-help/doc-1342586678228-en-LGEIL
IMAGE BURN OR IMAGE RETENTION Image retention is often due to static images left on the screen for extended periods of time. The result of this is known as Burn-In. Plasma televisions are the most susceptible to this issue due to the way the light is produced. It is normal to see a little image retention for a few seconds when changing channels or switching inputs and is not generally something to be worried about unless the image does not dissipate. Note: Image burn is not an issue covered under the manufacturer’s warranty as it is a preventable issue.
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Preventing Image Burn-In Orbiter may help prevent image burn however it is best not to allow any fixed image to remain on the screen for an extended period of time. It is recommended that you enable the Orbiter feature as it only has a very minimal effect on the picture quality and tends to function unnoticeably. Note: LG LCD/LED televisions do not offer any preventative ways to remove image burn due to the risk being very rare with this type of technology however it is still important that you do not let a still image remain on the screen for more than an hour at a time.
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Eliminating Burn-In There are two different ways to attempt to eliminate Burn-In on Plasma televisions: White Wash: White Wash attempts to remove ghost images from the screen. Use this feature sparingly. This feature should be used in 20-25 minute increments about every 1-2 hours. When this method is selected, a solid white screen will be displayed until it has been disabled. The solid white screen will try to burn the TV back to a solid screen state to remove any type of ghosting or image burn. After 20-25 minutes of use, disable the White Wash method and let the TV run normally for 30-45 minutes to see if the ghosting or image retention has been eliminated. If not, repeat this step a few more times. Color Wash: Color Wash attempts to remove any image retention that tends to only appear on certain colored screens. This method will constantly scroll several colors on the screen until disabled. This will attempt to reduce or remove any ghosting or image retention that appears during those colored screens.
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So what I take from both of these articles is that this type of technology is not designed to have static images on the screen for long periods of time. The manufactures recommend to use some type of screen saver built into their screens. This appears to be a characteristic to this type of technology rather than a defect. Interesting...still on the fence though.