My shredder does not turn ON but when I switch to go backwards, it works. I've sed for the first time earler tonight.

There is often a microswitch placed in the middle of the paper intake between the rolling knifes to activate the motor and can be blocked sometimes by paper parts when there are too little paper parts are schredded or some unusual objects such as tape or staples have been included accidential in most case its better to open the schredder too take a good observation because of damage the lever of the switch by pushing with some objects between the knifes, To prevent repeating complaint by working with often little shredding parts is when there is somebody handyman made a power activating pressure-switch on the powercable and unconnect the microswitch and bridge the 2 wires to each other inside the shredder for continu motor activation when you will schredding little pieces without having the same problems again because its designed for schredding only DIN paper or plastic sheets formats by user manual and the activate is only beginning by input from the middle of the device . by making a powercable push-switch there is no limit (but beware for safety rules first ) in first place )in case of home use / or use in office .