In my fairly limited experience the trouble is usually with one of the safety switches. There is generally one switch that isolates the operating switch and the motor unit until the shredder is correctly placed on it's dedicated bin. The bins aren't always a precision fit and I often have to have a couple of tries after I have emptied the bin or cleared a blockage.
The second safety switch or device will be to protect the device from overheating and will be in the form of an internal thermal fuse or bimetal switch placed in close proximity to the motor.
The other common reason is the internal switch that operates the unit automatically when a sheet of paper is fed into the slot. The microswitch isn't directly operated by the paper but by a linkage which is moved by the paper. The linkage is generally quite vulnerable to displacement or breakage.
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In my fairly limited experience the trouble is usually with one of the safety switches.
There is generally one switch that isolates the operating switch and the motor unit until the shredder is correctly placed on it's dedicated bin. The bins aren't always a precision fit and I often have to have a couple of tries after I have emptied the bin or cleared a blockage.
The second safety switch or device will be to protect the device from overheating and will be in the form of an internal thermal fuse or bimetal switch placed in close proximity to the motor.
The other common reason is the internal switch that operates the unit automatically when a sheet of paper is fed into the slot. The microswitch isn't directly operated by the paper but by a linkage which is moved by the paper.
The linkage is generally quite vulnerable to displacement or breakage.