Device considerations input devices check the

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Device Considerations Input devices Check the following when troubleshooting input devices: Make sure the device is plugged in securely. For stuck or malfunctioning keyboard keys, you might be able to pop the key off and clean the contact underneath. Be aware that replacing the keyboard might be cheaper than spending a lot of time cleaning it. Make sure that nothing is on the keyboard as the system boots. If a key is pressed during the boot up process, a 301 (keyboard) error can result. If this happens, then more than likely you will have to reboot. For wireless devices, check the battery level. Charge the device or change the batteries if necessary. If advanced features are not available for the device, update or install the correct device driver. USB/FireWire To troubleshoot USB and FireWire devices, consider the following: Install the driver before plugging in the device. Overloading the power resources of the USB bus can cause devices to not have sufficient power to work properly. Make sure that you are not exceeding 500 mA of power through the USB bus. Backwards plug insertion is easy to do with FireWire. This can cause your wires to start smoking and can possibly ruin the device. The cable might be too long for the current setup. Remember that shorter cable lengths are best; you should try not to use cables that are longer than 3–4 feet. Verify BIOS/UEFI settings for onboard USB and FireWire. Make sure onboard ports are enabled and that the
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correct USB version is enabled.
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  • Spring '14
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