Case Fan rattles when I boot up

Hi, so whenever I boot up my PC, the fan next to the IO port rattles. I usually fix this by tapping the back of the case. Do I have to remount the fan or is there another way to fix it.
I have an NZXT S340. Thanks

Hi, so whenever I boot up my PC, the fan next to the IO port rattles. I usually fix this by tapping the back of the case. Do I have to remount the fan or is there another way to fix it.
I have an NZXT S340. Thanks

When you boot up, the fans are usually revved up full speed.
Could be a loose bracket...but
Most likely you have a baring going bad.

Fans are really cheap now a days.
Best to replace.

Is there a way to fix it without replacing it? I would rather attempt to fix it before investing in another one. Thanks

Is there a way to fix it without replacing it? I would rather attempt to fix it before investing in another one. Thanks

Before fans became so inexpensive I used to open them up and grease it's shaft and bearing with lithium grease, that would quiet them down for few months.
How to fix noisy computer fans. - YouTube
How to repair a noisy PC fan - YouTube

Well its not the noise that's the problem, its how the fan rattles ad shakes the back of my computer :

Well its not the noise that's the problem, its how the fan rattles ad shakes the back of my computer :

That also may signify loose and worn bearing so grease instead of oil fixes it for a while because it's thicker. Missing or a damaged fin can be another but unfixable problem.
In any case, there's no miracle cure, either try to fix it like that or replace.

Is there a way to fix it without replacing it? I would rather attempt to fix it before investing in another one. Thanks

Bite the bullet, where talking a few dollars here.
It will get nothing but worse, so when your aggravation peaks you will
replace it.

I fixed it by just remounting it to the case lol
Thanks for the help everyone

I fixed it by just remounting it to the case lol
Thanks for the help everyone

So it was just hanging there ?

Nah the fan wasn't just hanging there. I think a few screws were loose there lol