If your US DS light is blinking spectrum, there are a few things you can do to troubleshoot the issue. First, check to see if your modem is properly connected to your computer. If it is, then unplug the power cord from the modem and wait 30 seconds before plugging it back in. This will reset the modem and may fix the issue.
If that doesn't work, try restarting your computer. Sometimes a simple reboot can clear up any issues with your connection.
If you're still having trouble, contact your internet service provider for further assistance. They may be able to help you troubleshoot the issue or provide additional support.