Saws - Popular Questions, Answers, Tips & Manuals
Mastercraft miter saw 55-6884-0 manual
If you take it to an electrician, the issue may well be the suppressor capacitor, across the switch contact, will be short circuit.
Get it replaced with a suitable Class Y components and it will be working again. OR
thee switch is faulty. Replaceable by a commonly available spare part.
Being 15 years old, there is little hope of a spare parts manual but it is a very basic design and should be easily repaired by a competent engineer.
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