Fixing my vacuum cleaner

Question

I've had a Eureka Optima lightweight upright for 7 months. One day while vacuuming the carpet in the living room, the motor started making a grinding sound. I thought something was caught in the rollers. After cleaning the small amount of fibers from the rollers, the sound continued. I have no suction. What could have happened?I have only two floors that are carpeted in my apartment.I don't use the vacuum cleaning alot. Please send my some information that could save my vacuum cleaner.