Netgear C7000 Nighthawk Ac1900 Wifi Cable Modem Router User Manual

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10
10.   Troubleshooting
This chapter provides information to help you diagnose and solve problems you might have with 
your modem router. If you do not find the solution here, check the NETGEAR support site at 
http://support.netgear.com for product and contact information.
This chapter contains the following sections:
•Troubleshoot with the LEDs 
•Cannot Log In to the Modem Router 
•Changes Not Saved 
•Wireless Connectivity 
•Troubleshoot Your Network Using the Ping Utility  

Troubleshooting 
102 Nighthawk AC1900 WiFi Cable Modem Router 
Troubleshoot with the LEDs
You can use the LEDs on the front panel of the modem router for troubleshooting.
Power LED Is Off
•Make sure that the power adapter is securely connected to your modem router and 
securely connected to a working power outlet. 
•Check that you are using the power adapter that NETGEAR supplied for this product.
•If the problem persists, contact technical support for help at www.netgear.com/support.
LEDs Never Turn...

Troubleshooting 
103  Nighthawk AC1900 WiFi Cable Modem Router
Additionally, check the setting for your computer’s TCP/IP gateway. It should be set to use 
the modem router. modem router. If your computer obtains its information from the modem 
router by DHCP, reboot the computer and verify the gateway address.
Cannot Log In to the Modem Router
If you are unable to log in to the modem router from a computer or WiFi device on your local 
network, check the following:
1. Make sure that you are connected to...

Troubleshooting 
104 Nighthawk AC1900 WiFi Cable Modem Router 
Changes Not Saved
If the modem router does not save the changes you make in the modem router interface, 
check the following:
•When entering configuration settings, always click the Apply button before moving to 
another screen or tab, or your changes are lost. 
•Click the Refresh or Reload button in the web browser. The changes might have 
occurred, but the old settings might be in the web browser’s cache.
Wireless Connectivity
If you are...

Troubleshooting 
105  Nighthawk AC1900 WiFi Cable Modem Router
-The WiFi signal strength is weak in your location:
Is your modem router too far from your computer, or too close? Place your computer 
near the modem router, but at least 6 feet (1.8 meters) away, and see if the signal 
strength improves.
Check for sources of WiFi interference that might block the signal. See Position Your 
Modem Router on page 9.
Troubleshoot Your Network Using the Ping Utility
Most network devices and routers contain a...

Troubleshooting 
106 Nighthawk AC1900 WiFi Cable Modem Router 
Verify that the Ethernet card driver software and TCP/IP software are both installed and 
configured on your computer. 
Verify that the IP address for your modem router and your computer are correct and that 
the addresses are on the same subnet.
Test the Path from Your Computer to a Remote Device
After verifying that the LAN path works correctly, test the path from your computer to a remote 
device.
1. From the Windows toolbar, click the...

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A
A.   Supplemental Information
This appendix covers the following topics: 
•Factory Settings 
•Technical Specifications  

 Supplemental Information
108 Nighthawk AC1900 WiFi Cable Modem Router 
Factory Settings
You can return the modem router to its factory settings. Use the end of a paper clip or a 
similar object to press and hold the Reset button on the back of the modem router for at least 
seven seconds. The modem router resets, and returns to the factory configuration settings 
shown in the following table.
Table 2.  Factory default settings  
FeatureDefault behavior
Modem router 
loginUser login...

 Supplemental Information
109  Nighthawk AC1900 WiFi Cable Modem Router
Wireless 
(continued)Country/regionUnited States
RF channel (2.4 GHz)Auto1
RF channel (5 GHz)CH 153 (or manually select Band I and 4 Channels)
Operating modeUp to 600 Mbps at 2.4 GHz, 1300 Mbps at 5 GHz
1. Maximum wireless signal rate derived from IEEE Standard 802.11 specifications. Actual throughput can vary. Network 
conditions and environmental factors, including volume of network traffic, building materials and construction, and...

 Supplemental Information110
Nighthawk AC1900
 WiFi Cable Modem  Router 
Technical Specifications
Table 3.  Modem router specifications  
FeatureDescription
Data and routing protocols TCP/IP, DHCP, Dynamic DNS, UPnP, and SMB
Power adapter  
(North America) 120V, 60 Hz, input
12V/3.5A DC output
Dimensions  Dimensions: mm x mm x mm ( in. x in. x in.) 
Weight  Weight: g (0. lb)
Operating temperature 0° to 40° C   (32º to 104º F)
Operating humidity 90% maximum relative humidity, noncondensing
Electromagnetic...