I have this Makita LS1040 miter saw, this is fairly a new saw, having this for about an year and half, used only 5-6 times during this period, totally run time would be in 3-4 hours range. Suddenly the breake started acting wired. tried to change brushes but okd brushes were almost the same as brand new ones, tried cleaning up the commutator, nothing fixed the issue.