Safety-rod of bowl does not depress microswitch of Cuisinart processor

Cuisinart does not have the original pieces available, but you can order a replacement work bowl, lid, sleeve, etc that will work from the company. First do a motor test to make sure the motor is still working:

Cuisinart Food Processors – Motor Test

First, do a motor test by removing the work bowl completely and using a pen to press in the grey button on top of the base (with the food processor turned on of course), toward the back. If the processor spins, the motor is still good. At that point, I would inspect the work bowl pieces, lid, pusher assembly, etc for cracks/damage. If all appears well, insert ALL the pieces back into place and try again. If even one piece is out of place, the processor will not spin.

If it no longer spins, the motor has a problem.

Good luck!

-Tha Mp3 Doctor

My DLC-7 had the same issue. Since the unit is manufactured in Japan with parts from Japan, a failed part likely was not the issue. So I flipped the unit over and removed the dark colored base and then the micro switches (there are 2 of them) and cleaned the electrical contacts and their connectors with contact solvent spray as they had become dirty with the massive motor flinging around dust inside. Then on each switch I depressed the stainless steel micro switch actuator plate down and bent plate back a little so that the switch would actuate with less force applied. Lastly on the rear center switch I removed the rubber diaphragm and cleaned and applied silicon spray to keep it pliable. Then I reassembled the unit and all works just fine.
Note that to remove the base you need to lift up the outside corner of each rubber foot (use a putty knife or something wide to prevent tearing it) and insert a philips screwdriver into the hole and loosen the screw until it spins freely (on one of the feet the screw hole is located towards the center of the unit). There is no need to remove the rubber foot, besides the foot will keep the screw in place. Then start prying the base loose from the white or tan (depending on you model's color) top cover starting at the front where the toggle switches are. Mine was stuck from food debris buildup. Life off the base from the rear hinging it out.
Total repair time about one hour. Easy and worth it to elongate the life of this older robust unit.