What is my next step?

Tech Solutions paper shredder model TS8000.
shredder only goes in reverse. I disassembled and cleaned and oiled the blades. Removed the gears, cleaned and regreased. Gear teeth all look good. Thinking maybe it's a switch ?????
Bill Breen, January 2023

Possibly a switch. Maybe more likely the little actuating lever that detects when something has been inserted, has snapped off. Unlikely to be able to source as a spare.

Snsb, January 2023