Was using my d4 just now and it started to make a funny noise so i turned it off and as it was winding down it sounded like there was something spinning freely. Took it apart and the cooling fan self destructed and stripped its self out. Has anyone else ever had this happen. This is the 2nd cooling fan ill need to replace( first one i stripped because i didnt know what I was doing the first time i took it apart) I was very careful when installing this one and have been using it alot for several months. I figure its going to be down awhile because this is going to be a hard part to find.