So my friends router is hooked up to their cable modem, a Arris Touchstone 420p and the downstairs computer doesn't get a good signal at all. So I moved the modem and router into a more central spot, plugged everything in exactly how it was before and no dice. The modem doesn't seem to go online. The DS light will blink for a bit then go solid and the US light will blink but the Online light will not go on. I reset the modem but still does the same thing. Any suggestions?