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Quick Tips
This section describes tips for troubleshooting some common problems.
Sequence to Restart Your Network
If you must restart your network, follow this sequence:
1.
Turn off and unplug the modem.
2.
Turn off the modem router.
3.
Plug in the modem and turn it on. Wait two minutes.
4.
Turn on the modem router and wait two minutes.
Check Ethernet Cable Connections
If your device does not power on, make sure that the Ethernet cables are securely plugged in. The Internet
LED on the modem router is lit if the Ethernet cable connecting the modem router and the modem is plugged
in securely and the modem and modem router are turned on. If one or more powered-on computers are
connected to the modem router by an Ethernet cable, the corresponding numbered router LAN port LEDs
light.
WiFi Settings
Make sure that the WiFi settings in the computer and modem router match exactly. The WiFi network name
(SSID) and WiFi security settings of the modem router and WiFi computer must match exactly.
If you set up an access list on the Advanced Wireless Settings page, you must add each WiFi computer’s
MAC address to the modem router’s access list.
Network Settings
Make sure that the network settings of the computer are correct. Wired computers and computers that are
connected over WiFi must use network IP addresses on the same network as the modem router. The simplest
way to do this is to configure each computer to obtain an IP address automatically using DHCP.
Some service providers require you to use the MAC address of the computer initially registered on the
account. You can view the MAC address on the Attached Devices page.
Troubleshoot With the LEDs
By default, the modem router is set with standard LED settings. If you turned off the LEDs except the Power
LED, you must return the LEDs to their standard settings for troubleshooting. For information about controlling
the LED settings, see
on page 13.
Troubleshooting
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Nighthawk AC1900 WiFi LTE Modem Router