Well I hope it wont overheat too much. I have PS3 and my 32'' FULLHD TV so I need to put it on good spot. Hmm could under the TV be good because there is a table between ps3 and the tv and my ps3 havent never overheated
How long a device is on is no indication of how well it is being cooled. Assuming a fairly steady load (playing a movie) most every device will likely stabalize at an operating temperature within 5 minutes tops.
Also, just because a device is steadily running doesn't mean it is fine long term. Elevated operating temperatures can reduce operating life, although in truth most CE devices will outlive their usefulness before they die of high temp cycling (early PS3s phats being one of the exceptions.)
Finally, operating at extreme high temps can cause damage quickly, but most of the damage to a CE device occurs in the transient warm-up/cool-down periods when it is turned on or turned off. That is when thermal expansion is causing the most change in strain on the components/solder joints. (Somewhat related, but just kinda neat overall: http://www.centennialbulb.org/ it's only been turned off one time, to move it to a new firestation.)
Anything electronic can overheat. I even have a bluray player that the manufacturer discontinued because of heat design issues. It works fine now that I upgraded the main heatsink, but before it would lock up after long hours of use.
ambient room temp can also attribute to an overheating situation.
If you are stacking / storing your gear in a cabinet where airflow is restricted, that too could easily cause a device to overheat.
Lastly, the product itself could be poorly designed or cheaply made and does not offer a way to cool itself off. Many Chinese made electronics will cut corners and will not put a heat sink to keep the heat generating electronic component cool.
As a safeguard, where applicable, I use fans made for PC's, running on 5V DC to keep the cabinets and electronics cool.
I have two 8port gigabit switches that are really warm to touch. Same with my apple airport extreme N router. These devices now sit over an inexpensive laptop cooler, powered through a USB port.
These small customizations to keep the devices cool has made a big difference.
Lastly, in my media streamer (popcorn C-200), as an extra safeguard, I replaced the stock heat sink with a high quality copper heat sink which has better conductivity and heat transfer. By making this simple change, I notice a difference.
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