Devices which uses lots of power and/or runs for quite a long period of timeis expected to produce a certain amount of heat. Therefore, the need for cooling systems in such devices. The tech. companies found means of introducing these cooling systems into their devices. Ranging from Desktop Computers to Gaming consoles are all equiped with fans to help in the heat regulation. Even the basic modem we use gives off heat enough to iron our clothes with it! lol
What happens when these cooling setup fails to function as they were built to? Several damages could occur. Most would render the device useless. But as a piece of tech, there is no 100% guarantee of full lifespan usage without malfunctions. Below are some amazing pictures showing how many handle their cooling system proplems:



Newstension:
http://www.newstension.com/9-hilarious-exotic-pc-cooling-setups/

What you should be consign pretty much about is whether or not they are performing the task assigned to them.