Recently my DGL-4500 Started emitting a high pitch whine, it has progressively gotten worse over the past couple of weeks. I have Taken the router to a friends house, and to work to see if its something in my house causing it but all signs point to the router. Nothing seems to have any effect on it the only way to make it stop is to unplug it. All of the routers functions work normally. I have only had this product about 3 months and love it but something has to give on this noise it is driving myself, my wife, and my dog KRAZY.. Thanks in advance for any help you guys have to offer.