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We fix and repair laptop motherboard no video, no...
Were there quick install instructions?
They usually have you power up the modem after plugged into your DSL/Cable Modem, then plug in your computer.
Are you getting a link light that indicates its seeing the internet?
The cable from your laptop or desktop pc should be in port 1 (or 2, 3, 4) of the router. The WAN or internet port should be plugged into your cable or DSL modem.
Can you verify this?