i got a simler prob but i cant get my router to work at all with comcast i switched from charter to them cuase there now offering 3.2 dwn and 3.0 up here twice as fast as charter but my router will not work at all with there new modems terayon tj715x all the lights blink and ever thing seems as though its working but it dont i get a no connection in the router it cant reach the net at all i tryed many diffrent cable setup and cables just to make sure i didnt have a bad cable some place also cloned the mac add from the modem into the router all i get is a light saying computer is connected to the modem ..