Ask HTG: Why Do Old Computers and Game Consoles Turn Yellow?
 

It’s a tale nearly as old as computers themselves. You pull your trusty old video game console or vintage 1980s computer and it’s yellow, greenish, or some combination there of instead of the gray or beige it once was. What gives? Why does your old tech turn yellow? And further, what can you do about it?

http://www.howtogeek.com/196687/ask-...s-turn-yellow/