Introduction
Sending and receiving wireless signals requires an antenna. If the antenna is faulty, the device will not work as intended. Replacing the antenna should resolve most connectivity issues.
What you need
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Disconnect the power cables and ethernet from the device.
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Unscrew the external plastic antennas. There is one antenna on each side of the device.
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Using a Phillips screwdriver remove the the three screws that fasten the main circuit board to the chassis.
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Conclusion
To reassemble your device, follow these instructions in reverse order.