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Table 2. LED and button descriptions
DescriptionLED
Solid amber. The modem router is starting.
If the Power LED lights solid amber during any other time, a power-on self-test (POST) failure or
device malfunction occurred.
For more information, see Power LED Remains Solid Amber on page 285.
Blinking amber. The modem router was reset to factory default settings and is restarting.
For more information, see Return the Modem Router to Its Factory Default Settings on page 221.
Solid white. The modem router is ready.
Off. Power is not supplied to the modem router.
For more information, see Power LED Is Off on page 285.
Power
Solid white.The modem router is connected to a DSL service or cable or fiber modem and detected
an Internet connection.
Solid amber. The modem router is not connected to a DSL service or cable or fiber modem or did
not detect an Internet connection.
For more information, see Troubleshoot the Internet Connection on page 286.
Blinking white. The modem router is negotiating the best possible speed on the DSL line.
Alternating white and amber. The traffic meter is enabled and the traffic limit is reached.
Off. The modem router cannot connect to the Internet or the Internet connection failed.
DSL/Internet
Solid white. The 2.4 GHz WiFi radio is operating.
Blinking white. The modem router is sending or receiving WiFi traffic over the 2.4 GHz radio.
Off. The 2.4 GHz WiFi radio is off.
2.4 GHz WiFi
Solid white. The 5 GHz WiFi radio is operating.
Blinking white. The modem router is sending or receiving WiFi traffic over the 5 GHz radio.
Off. The 5 GHz WiFi radio is off.
5 GHz WiFi
Solid white. A USB device is connected and is ready.
Blinking white. Data is being transmitted to or from the USB device.
Off. No USB device is connected, or someone clicked the Safely Remove Hardware button and
it is now safe to remove the attached USB device.
USB 3.0 port 1 and USB
3.0 port 2
Hardware Overview of the Modem Router
14
Nighthawk X4S AC2600 WiFi VDSL/ADSL Modem Router Model D7800
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