Hyper N620 fan sound problem

One of the fans on my Hyper N620 is making a really annoying 'tapping' noise. If I put a little pressure on the middle of the fan, the noise stops. I don't really know what to do with this thing.

As you can see from this pic http://www.hardwaresecrets.com/fullimage.php?image=21231 it only has 2 screws per side at the top, so it doesn't really give me much to work with anyway. I've tightened the screws on the 'chattery' side to no avail.

Any suggestions other than replacing it?
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More about hyper n620 sound problem
  1. If under warranty we can get this replaced. You can fill out a parts request by following the instructions below.


    Please fill out the parts request form found below and we can send you the part you need.
    http://coolermaster-usa.com/partrequest.php
    Use the model number of the cooler(RR-212E-20PK-R2) and in the description box state you need the fan replaced or accessories kit.
    The serial can be found on the cooler’s fan connector on a white sticker. If you cannot find the serial number, then a copy of the invoice must be uploaded.
    when done with request please provide me the parts request number so i can approve the request.
  2. Thanks, but I've managed to resolve this for now. I took the fan off and used isopropyl alcohol spray on the cooler/fan and it seems to have gone away. It's about 2 years old so I guess there was some dust build up.
  3. Good to know, let us know if you run into any other problems.
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