What the H is going on with my network?

Something funky has been going on for about 4 days now. When I get home, I try and log onto the internet and I can’t. I look at my Airport Extreme router . . . looks good. I look at my Motorola DSL modem, everything looks fine but the “Internet Activity” light isn’t blinking, but there are no red lights. I reset both, and it doesn’t work. I literally have to reset them like 4 or 5 or 6 times before my computer can connect to the internet. I know it’s something with the modem or router b/c it also happens when my iPhone and my wife’s computer try and log onto the wireless network.

I’m thinking it’s the modem though, b/c my computer can still backup and access the external drive connected to the router. . . any thoughts?! Why do I have to unplug the modem so many times before it starts blinking the internet activity light, and actually giving me internet?