What should my friend do when the cable gets disconnected?

My friend has Roadrunner Cable and there only 1 light is flashing green and the rest are blank and she needs to have them all green and working. What is the best way to fix this Is it turning off the power to the router after the computer is shut down Or unplug the cord in the back of the cable box

 

Hi cheater. If your friend has a spliter that splits signal to the television and modem disconnect it from the spliter and modem.next power down the modem and connect the cable that comes in from the street and connect directly to the modem.after a few minutes of powered down power back up if the modem sinks you either have a bad spliter or a bad section of cable that comes off the spliter to the modem.If it does not work you need a tech from her service provider to check the db signal coming in from the street. For high speed cable the signal must be strong.Example a + plus 9 db is great a low plus is not good and anything -negative to really bad =No connection.Keep in mind a television signal does not require a very high db signal to get clear televison high speed internet/modem a must.try this and see how it goes.

 

Here I just turn the power off/on to the router without turning the pc off and wait for all the needed lights to show up.