I work in a salvage business wher i get to see alot of brand new electronics . This means LCD tv sets . I noticed in some of these they cover each circuit board with metal covers . Lately i have been seeing overkill on these covers . This makes the boards fully covered even the edges and only several very tiny vent holes in the top , so small you cant see in at all
Now i see most sets only cover a couple boards but they have very big holes . The rest of the boards are fully open .
This last set was so ``cover overkill`` it would overheat . I removed 3 covers and it works fine . The power supply is a separate box on the power cord . This supply is cased in a solid plastic box , take that off to find 2 layers of aluminum wrapped around it all taped on with yellow tape . Take that off and find a full layer of plastic and more yellow tape , take that off to find a full 4 sided thick aluminum heat sink all screwed together , at least the ends are open . Take the top off of that and all the small transformers are tightly wraped in more of that yellow tape . Any open spots in that heat sink had pieces of clear stiff plastic tucked in next to it ... then to top that off they squirted white silicone glue here & there down between parts .
I can see a bit of protection from dust and some RFI noise elimination protection but this particular product was clearly made for planned self death in a short time .
I see plenty of electronics of the same nature with only 1/4 or less of this ``smothering`` and they work just fine .