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Troubleshooting Symptom Charts/USB Peripherals - 27 5. 6. printer is connected. If it does, it is a software issue. Check cables. Contact Apple to schedule repair. USB device experiences a partial lack of power 1. 2. Plug the device into an electrical outlet if it has a power cord. Unplug the device and plug it into another device plugged into a power outlet such as a USB hub. Not enough power for the USB device to function at all 1. 2. Plug the device into an electrical outlet if it has a power cord. Unplug the device and plug it into another device plugged into a power outlet such as a USB hub.
