We have a LG LRM1260SW Microwave Oven thats 2 years old and the turntable started to get caught or hung up and it would stop, make some rubbing type noise and then start going again. Then just stopped rotating completely. We replaced the rotating ring because the wheels were flattened and really wore down thinking that was why it wouldn't turn. But that didn't make a difference. What else could cause the rotation to stop? Thank you in advance, Elaine