grinding on D10

I’ve had this D-10 for over a year and has been doing fine. It just sarted making grinding noise internally. I cleaned everthing I can access to but it still grinds away. I wanted to open it up but it has warratee seals on it. What do I do now?

If you use yours every day like I do, then it has well surpassed the cost that you paid. Go ahead and open it up. You have nothing to lose and who knows you may just find the problem.