I have the asetek LCLC liquid cooling and I'm trying to exchange my MB for another one because the CPU FAN header is not working. But the bracket that mounts to the MB is not coming off. I unscrewed 3 of the screws that bolts it to the MB but the 4th one is STUCK. When I turn it, it basically turns with the threaded metal inserts that are on the back of the MB. I've tried screwing all 4 in and just unscrewing that 4th one but still no luck. I've been trying for hours and hours and I'm pretty much stuck. I don't want to have to buy a new MB and a new CPU cooler....

The installation guide looks like this http://www.asetek.com/images/stories/support/installation-guides/asetek-installation-web.pdf
The step 2 threaded metal insert is turning with the step 3 J screw when it's not supposed to. Did anyone ever experience this problem before? ThanksI've had this problem before, it APPEARS to be because the plastic bracket that holds the inserts is, in short, rubbish.  It's far too easy to end up with the insert basically gouging a small hole and then being able to turn freely.
If it's unscrewed even slightly, you may be able to get a grip on the insert from underneath with some needle nose pliers and then unscrew the screw.  If not, well, you'll have to use something anyway to hold the insert still while you unscrew the screw.
It's a little hard to explain but I've done this MAYBE 15-20 times with the Corsair rebranded versions (H50 mainly) due to the exact same issue.Thanks again. I'm definitely going to give that a try. I hope I don't have to buy a new MB and a cooling because of this.Put it this way, I have built maybe 500 systems with LCLCs, and had direct experience with PROBABLY another 2000 or so builds with them in, and never had to abandon one (or the motherboard it was attached to) due to this particular fault - other problems, sure, but not this one.  You will need a new plastic bracket though.