Diagnostics and Troubleshooting
207
AC1200 WiFi DSL Modem Router—Essentials Edition Model D6100
Troubleshoot with the LEDs

When you turn on the power, the LEDs light as described here.

1. When power is first applied, all LEDs light for about one second.

2. The Power LED lights solid amber for about 20 seconds, turns off for about 10 seconds

(no LEDs are lit), and then lights solid amber again for about 30 seconds.

3. After approximately one minute, the DSL LED blinks green to indicate that the modem

router is negotiating the best possible speed on the DSL line. If the negotiation completes

and a DSL link is established, the LED turns solid green. If you do not use a DSL modem

but a cable or fiber modem, the LED remains blinking.

Your cannot connect over an
Ethernet cable to the modem
router.
• Make sure that the Ethernet cables are securely plugged in.
• Make sure that your computer or device does not use a static IP address
but is configured to receive an IP address automatically with DHCP. (For
most devices, DHCP is the default setting.)
You cannot connect over WiFi
to the modem router. • Make sure that the WiFi settings in your WiFi device and modem router
match exactly.
For a device that is connected over WiFi, the WiFi network name (SSID)
and WiFi security settings of the modem router and WiFi computer must
match exactly. The default SSID and password are on the product label (see
Bottom Panel Product Label on page 14).
• Make sure that your WiFi device supports the security that you are using
for your WiFi network (WEP, WPA, or WPA2). For information about WiFi
security settings, see Manage the Basic WiFi Settings and WiFi Security of
the Main Network on page 73.
• Make sure that the modem router is not too far from your WiFi device or too
close:
- Move your WiFi device near the modem router but at least 6 feet
(1.8 meters) away and see if the signal strength improves.
- Make sure that the WiFi signal is not blocked by objects between the
modem router and your WiFi device.
• Make sure that the WiFi LED on the modem router is not off.
If this LED is off, both WiFi radios might be disabled. For more information
about the WiFi radios, see Control the WiFi Radios on page 88.
• Make sure that the modem router’s SSID broadcast is not disabled.
If the modem router’s SSID broadcast is disabled, the WiFi network name is
hidden and does not display in your WiFi device’s scanning list. To connect
to a hidden network, you must enter the network name and the WiFi
password. For more information about the SSID broadcast, see Manage the
Basic WiFi Settings and WiFi Security of the Main Network on page 73.
• Make sure that your WiFi device does not use a static IP address but is
configured to receive an IP address automatically with DHCP. (For most
devices, DHCP is the default setting.)

Table 4. Quick tips for troubleshooting

Problem Possible Solution