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Just start by taking the intake off and examine the wheel. Look for big nicks or pieces. Then try to move it side to side. You shouldnt be able to make it contact any of the surrounding metal. It could also be something else causing you not to have any power and that would result in not hearing the turbo. IE one or more cylindars not working. Hopefully if there is something wrong it is the turbo. That would be the easiest fix.
We need a bit more in-depth description of the "no power" statement. Does the truck not accelerate? does it loose power at a certain RPM? We love to help but need more info.