My Makita LSO714 sliding compound miter saw just quit! 8 year old saw - nearly daily use.

Pull the trigger for one cut and all is OK. Pull the trigger for a second cut and quiet is all I got .

No problems with the outlet and the chord is undamaged (as far as I can tell) - no reason for it to be damaged.

Anyway - questions are -

1) How can I tell if the problem is the switch or something else?

2) If the brushes are worn would the machine just stop working?

Any advice will be greatly appreciated. Thanks much.