GBC Shredmaster 5260X - door is closed by ...

Most shredders use a little lever on the door itself to depress a switch on the shredder cabinet when it's closed. This acts as a secondary on/off switch to allow the motor to work when it's safe to do so.Look inside the cabinet with the door open (usually around the perimeter of the opening, towards the top) for a switched door catch, a "slot" with a metal strip exposed, a little box with a lever jutting out of one end of it, or similar. The "slot" type is used when a door mounted "finger" depresses into the slot upon closing, and the metal strip completes the circuit. Any of these different mechanisms may need to be readjusted, replaced, or usually is just jammed up with bits of loose paper that doesn't allow the switch to close all the way. Hope this helps!

This shredder has a magnet built into the door. If you open the door you'll see a metal strip on top right side of shredder. Either the magnet is not getting close enough to activate the reed switch or the hinges have came loose allowing a door sag condition. Also, if the shredder isnt that old, just contact GBC for some warranty work at 800-790-7787