The activation sensor is located on the top in the middle of the feed slot. If the activation sensor is no longer functional, there is no way to start the shredder while in "Auto/On" mode, therefore the sensor needs to be replaced. For replacement information regarding this sensor you can refer to our troubleshooting page AmazonBasics B0050BPWBQ Troubleshooting .

Caution: Please do not place your fingers into the shredder in an attempt to fix the jam. You can switch to "Reverse" mode on the shredder. This will back up the paper and loosen the jam. You may have to pull some papers out of the shredder in order to clear the blades. After the jam is cleared, you can return back to "Auto/On" mode and resume shredding. Please refer to our trouble shooting guide. AmazonBasics B0050BPWBQ Troubleshooting