How to Diagnose the Computer Problem on Input Devices
An input device is any piece of hardware used to communicate with a PC. These include the mouse and keyboard as well as optional extras like joysticks and touchscreens. When an input device malfunctions, you can take a few steps to troubleshoot the problem, potentially saving you time and money at the repair shop.
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Instructions
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1
Unplug the input device with the problem from the PC, replacing it with a device of the same type that you're sure is functional. If the second device works, you know that you have a problem with the original input device, necessitating repair or replacement. If the second device fails to operate as well, you should continue to Step 2.
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2
Plug the original input device into a different port on the same computer. This works when the input device can connect to multiple locations on the same machine, as USB devices do. If the input device functions well when connected to another port of the same type, you know that the problem is not with the input device but with that particular port on the computer's motherboard.
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3
When the device can only connect to one port (as with keyboards and certain mouse types), plug the original input device to another computer. As in Step 2, if the input device functions well when connected to another port of the same type, you know that the problem is not with the input device but with that particular port on the motherboard.
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