I've had a 92mm Zalman fan cooling my XP-90 for a few months now and for the last few days, my motherboard has given me "CPU Fan Error" every time I start up. I thought it might just be a connection problem, as the fan was still spinning. This morning when I started my computer, the fan made a loud whirring sound but did not spin. I took the fan off the HS and the blades are very stiff unlike my other fans. Is the fan dead and is there any way to fix it?