Why is 220V Cooling Fan noise?

Analysis:
1. The "dota2雷竞技下载 " blade deformation or motor failure;
2. "dota2雷竞技下载 "turntable motor failure or raceway with debris;
3. Transformer / magnetron fixed bad;
4. Transformer / magnetron itself failed. Solution: "dota2雷竞技下载 "Check all possible causes of points.