i got a Motorola Sb5100 cable modem and it works once in a while ok it works for 1 day but the next it wont and the next it would when it dosen't work Power is on (green) Receive is on (green) but send keeps blinking and online is off and Pc/Activity would blink once in a while but its suppose to keep blinking and a D-link router is connected too it and i don't think thats the problem and everything is connected well downstairs in the basement??