How To Fix Us Ds Blinking Light Xfinity

Trouble shooting for Cable Internet

Before contacting technical support please check the following:

Check Connection

Have your changed your modem? Modem's Mac Address and Serial Number should be updated to Rogers Portal, or Internet will not work.
Is your modem connected as per the Modem Connection Guides?

Is the coaxial cable connecting your modem to the cable jack secure at both ends?
Is the cable connecting your modem to your computer secure at both ends?
Is the power adapter connected securely to the modem and other end to the power outlet?
Is the modem connected to the cable jack it was originally installed?

Check Modem Lights

DS light: Downstream light - Solid On / Flashing / Off (Should be Solid On; if Flashing or Off, that means your modem isn't getting signal over the coaxial cable.)
US light: Upstream light - Solid On / Flashing / Off (Should be Solid On; if Flashing or Off, that means your modem isn't getting signal over the coaxial cable.)
Online light: Solid On / Flashing / Off (Should be Solid On; if Flashing or Off, may be modem configuration problem or service has not been activated.)

Power Cycle

Unplug your modem from power for 1 minute and then plug it back in.
Try resetting your modem. This can be done by holding the Reset button for at least 15 seconds and then releasing it.

Troubleshooting

No Sync - "US" or "DS" light is blinking or off on modem

Loss of sync occurs when your modem's "DS" or "US" lights are either off or flashing. Please note that if the "Online" light is on, the modem is updating its system software and service should be automatically restored after a few minutes.

If your modem does not have sync:

Ensure your modem is plugged in, and powered on. Try unplug the modem from power for 1 minute, then plug it back in.
Ensure that the coaxial cable is securely connected to both the modem and the cable jack.
Ensure that your modem is plugged into the cable jack it was originally installed on. Even if you have more than one cable jacks, they may not be active.
Verify the modem and cables in use. Are you using the modem registered by World-Link?

Speed Slow

Speed degradation can be caused by various factors including:

Did you reboot your modem recently? Rebooting modem helps with most issues.
During peak times such as evenings and weekends, when more people are using Internet, speeds are likely to be slower.
If you are using Cable Internet, you share bandwidth with other Cable Internet subscribers in your neighbourhood. If someone is using a lot of bandwidth, such as uploading large files of streaming high-definition video, your Internet performance may be slower.
If the website you are trying to use is located on a server with slow connection or heavy traffic. Or the server is experiencing problems of overloading as too many people are trying to access the same server at the same time.
Spyware and viruses are a common cause of slow connection. Your computer may be infected if webpages take a long time to load. Another sign is a pop-up message telling you to download a certain program to fix a problem.
File sharing programs can use up your Internet bandwidth, with little leftover for other Internet usage.
Game systems, such as PlayStation, Xbox, Nintendo, connected to the Internet may be using up most of your Internet bandwidth.

Conduct Speed Tests

Cannot browse the Internet

If all of the lights on your modem are on, however you're still not able to access the Internet, please review the troubleshooting steps below. Make sure to try browsing again after each step, as any one of these may restore your service.

Try unplug the modem from power for 1 minute, then plug it back in.
Reboot / restart your computer
If you are using a router/firewall/switch, please test with a "stand-alone" setup. This is done by connecting a single computer directly to your modem.
Try resetting your modem. This can be done by holding the Reset button for at least 15 seconds and then releasing it.
Can you ping any web resources? Attempt to ping "google.ca"
If you have any firewall/security software installed, try temporarily disabling this.
Ensure you are not behind a proxy server.

"Online" light is red or off on modem

Check the connection from your computer to the Modem LAN Port; try with another Ethernet cable to connect your computer to the LAN port of the Modem
Check computer's Network Adapter and Networking Properties
- Network adapter is enabled and set to obtain an IP address automatically
- What is your computer obtaining as an IP address from the Modem?
  1. 169.254.x.x | Media Disconnected | Nothing
    - Check the network cable and connections.
    - Try using a different computer if possible.
    - Try connecting this computer to a different device (ISP modem, router etc) to see if it will obtain an IP from the other device.
    - Un-install & re-install the driver for your network adapter.
  2. 192.168.0.1 (wireless modem) 216.181.x.x (wired modem)
    - This means that your computer is establishing a connection to the modem but cannot use the Internet
    - Reset your browser to default settings.
    - Temporarily disable security software.
    - Try another browser or application.
Perform a long power-cycle on all of your devices
- Turn off / disconnect the power to all of your devices (including the computer) for at least 2 full minutes
- Reconnect the power to your modem
- Wait 30 seconds or until the modem has completed its power-up sequence
- Identify the device connected to the modem's LAN connection and power it up Wait until this device is powered up and continue powering up your other devices in the same manner until the PC is back up and running
Reset TCP/IP for a Windows PC with netsh int ip reset

Link light: Off

The connection cannot be established between the modem and your computer.

Ensure that the ends of the Ethernet cable are securely attached to the modem and your computer.
Try a different Ethernet cable if one is available
Check for additional Ethernet ports on your computer. If you have more than one please try connecting the Ethernet cable to (one of) the other port(s).
If another computer is available, try connecting the modem to the other computer.

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