i have one problem - CPU Fan buzzing sound

[quan chi]

greetings friends

for the past 2-3 weeks my cpu fan is making a buzzing type of sound.after 10-15 minutes when ever i turn on the pc.

then i found out that when the fan's speed increases the plastic rib on which it is supported or fixed.vibrates and makes that buzzing sound.

when i press that rib the sound stops.but when again i free the rib it starts vibrating again.

if i hit the sides of the rib few times during the buzzing.then also it stops.but later again when i turn on the pc.it starts.

please help is there anyway i can stop it.

[karmanya]

You probably have a wire touching the side of the fan, or maybe its dirty, or maybe the screws are loose- solution open her up,clean everything,tighten whats loose.

Its 90% wire touching prob. i had it once

[quan chi]

well i did opened the cabinet.but didnt found any wire passing near it.btw how to tighten it?