If the plastic is yellowed, you *might* try wiping it *briefly* (once, at most twice) with acetone, which will dissolve a thin outer layer of plastic on one or more of the backlighting sheets But do it only *briefly* as you don't want to cause the plastic to possibly become non-uniform in its lighting capabilities. Also, wait a long while before reassembling as you don't want the slightly gooey plastic to stick to other layers of the panel. Wiping with acetone works great when restoring bicycle parts, but I did accidentally remove a maker's logo the first time I tried it and got overzealous with the acetone.
I have to say the above is bad advice
based on what I have read. I definitely would not allow acetone anywhere near my display. Acetone dissolves plastics. Acetone is also used to cement certain plastics such as acrylics.
Here is a better reference for cleaning LCD displays:http://isweb.fdu.edu/computing/lcd.html
Fairleigh Dickenson University wrote:
Not all types of cleaning solutions are acceptable for LCD screens. Using alcohol or ammonia - based cleaners repeatedly may cause permanent damage to the LCD. Over time, using these types of cleaners could cause the surface of the screen to yellow. It can also make the screen brittle and eventually cause cracking on the screen surface.
The following cleaners should NOT be used:
* Ethyl alcohol
* Ethyl acid
* Methyl chloride
The link below says the same thing:http://support-us.samsung.com/cyber/pop ... 1981606887
Do not use cleaners that contain the following agents:
* Ethyl Alcohol
* Ethyl acid
* Methyl Chloride