I have a samsung HT-D5610

Question

I have a samsung HT-D5610 that makes a loud buzzing sound that comes from only the receiver almost every time i turn it on. (it could also be described as a loud whirring noise as well) It sounds like it could be the fan, or maybe something trying to load in the dvd area. the only way i've learned to get it to stop is to turn the system off and on until it eventually boots up quietly. otherwise it will continue making the really loud buzzing noise for as long as i let it. any help is much appreciated.thanks,[e-mail]