AW106PT Safety Cut Out

I have an AW106PT 10" planet thicknesses that I purchased around 12 years. It suddenlybstopped working, ive had all the electrics checked and they are all okay. I’ve been told that there is a ball bearing safety button / switch on the rear table so that it can’t start up. I can’t find the switch … can anyone help as I think it may be stuck in one position? Thanks

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