I just bought a used MicroGem DTV converter at an auction. The price was right, and it works ok. But I noticed that it gets pretty hot compared to my other converters (other brands). I also read on several websites that these converters are known to die in a short time because of excess heat, and many were sent back to the manufacturer for replacement. Because of the way I bought it, there is no warranty. Rather than let it burn out, I would like to add a heat sink to whatever part(s) gets hot. Does anyone know what part(s) overheats? (I might also enlarge the tiny holes in the case, or maybe even install a small fan (like a CPU fan, if there's a proper voltage source to run a CPU fan).