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88 | Chapter 8. Troubleshooting
N750 Wireless Dual Band Gigabit Router WNDR4000 User Manual
Quick Tips
This section describes tips for troubleshooting some common problems
Sequence to Restart Your Network
Be sure to restart your network in this sequence:
1. Turn off and unplug the modem.
2. Turn off the wireless router and computers.
3. Plug in the modem and turn it on. Wait 2 minutes.
4. Turn on the wireless router and wait 2 minutes.
5. Turn on the computers.
Power LED
Check the Power LED to verify correct router operation.
If the Power LED does not turn off within 2 minutes after you turn the router on, reset the
router according to the instructions in
Restoring the Factory Settings and Password on
page 93.
Check Ethernet Cable Connections
Make sure that the Ethernet cables are securely plugged in.
• The Internet status light on the wireless router is on if the Ethernet cable connecting the
wireless router and the modem is plugged in securely and the modem and wireless router
are turned on.
• For each powered-on computer connected to the wireless router by an Ethernet cable,
the corresponding numbered router LAN port light is on.
Wireless Settings
Make sure that the wireless settings in the computer and router match exactly.
• For a wirelessly connected computer, the wireless network name (SSID) and wireless
security settings of the router and wireless computer need to match exactly.
• If you set up an access list in the Advanced Wireless Settings screen, you have to add
each wireless computer’s MAC address to the router’s access list.