An annoying sound is coming from CPU cabinet

BUMBU

Reputable
May 21, 2014
11
0
4,510
Everyday I boot to my pc in the morning, an annoying sound comes from the cabinet. It stays for a long while. But after I rebooted when it stables to desktop, then the sound completely goes off. This happens only in everyday morning. Plz help to detect the problem. And plz give the solution......