HP Dc7700 HP Compaq dc7700 Business Desktop PC Service Reference Guide, 1st Ed - Page 250
Solving Front Panel Component Problems
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Troubleshooting Without Diagnostics Solving Front Panel Component Problems Solving Front Panel Component Problems Problem Cause Solution A USB device, headphone, or microphone is not recognized by the computer. It is not properly connected. 1. Turn off the computer. 2. Reconnect the device to the front of the computer and restart the computer. The device does not have power. If the USB device requires AC power, be sure one end is connected to the device and one end is connected to a live outlet. The correct device driver is not installed. 1. Install the correct driver for the device. 2. You might need to reboot the computer. The cable from the device to the computer does not work. 1. If possible, replace the cable. 2. Restart the computer. The device is not working. 1. Replace the device. 2. Restart the computer. D-32 433612-001 Service Reference Guide, dc7700