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Troubleshooting
138
N750 Wireless Dual Band Gigabit ADSL Modem Router DGND4000
Some cable modem service providers require you to use the MAC address of the
computer initially registered on the account. You can view the MAC address in the
Attached Devices screen.
Troubleshoot with the LEDs
After you turn on power to the wireless modem router, the following sequence of events
should occur:
1. When power is first applied, verify that the Power LED is lit.
2. Verify that the Power LED turns red within a few seconds, indicating that the self-test is
running.
3. After approximately 30 seconds, verify:
The Power LED is solid green.
The Internet LED is lit.
The Ethernet LED is lit for any local port that is connected to a computer. This LED
indicates that a link has been established to the connected device.
The LEDs on the front panel of the wireless modem router can be used for troubleshooting.
Power LED Is Off or Blinking
Make sure that the power cord is securely connected to your wireless modem router and
that the power adapter is securely connected to a functioning power outlet.
Make sure that you are using the 12V DC, 5A power adapter that NETGEAR supplied for
this product.
If the Power LED blinks slowly and continuously, the wireless modem router firmware is
corrupted. This situation can happen if a firmware upgrade is interrupted, or if the wireless
modem router detects a problem with the firmware. If the error persists, you have a
hardware problem. For recovery instructions, or help with a hardware problem, contact
technical support at
www.netgear.com/support.
Power LED Stays Red
When the wireless modem router is turned on, the Power LED turns red for about 20 seconds
and then turns green. If the LED does not turn green, the wireless modem router has a
problem.
If the Power LED is still red one minute after you turn on power to the wireless modem router:
1. Turn the power off and back on to see if the wireless modem router recovers.
2. Press and hold the Restore Factory Settings button to return the wireless modem
router to its factory settings. See
Factory Settings on page 148.
If the error persists, you might have a hardware problem and should contact technical support
at
www.netgear.com/support.
138


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