If the modem's power indicator light is off, check the modem's power source to ensure it is securely plugged in. Your cable modem should be plugged in and powered on 24 hours a day.

If the modem appears to be securely plugged in and the power indicator light is still out, try another outlet and/or power strip that you know to be in good working condition.

If the above still does not solve the problem, a service call may be required.