Hi, I have a well used ew112 G3 set that has started to make terrible cracking and popping sounds after being used for about 45minutes. This is happening almost all the time, in different locations, different people, etc. The sound is clear for about 45 minutes and then it slowly begins to start popping and crackling until about 10 minutes later it is unusable. If I switch it off for 30 minutes then it works fine and the same thing happens. Is it common that they might overheat? The set is about 7 years old and this problem has only just started .... any temporary fix that could get me through a few more shoots? Thanks