Green Light but No Internet

Thanks, I'll give that a try tonight and let you know what happens.

Still nothing, and to top it off the hardwired computer will not access the internet through the modem anymore. Perhaps Linksys routers are not compatible with Comcast? Gonna try starting from scratch and we'll see what happens. Thanks anyway.

Okay, I've gotten the hardwired G4 back online (disconnected everything, reset router, reconfigured/encrypted router, reconnected everything and bingo - G4 can connect to internet!)

Still no wireless connection with the Intel iMac. After searching endlessly on the internet for solutions, here's what I've tried so far: Restarted iMac-still no internet, Renewed DHCP lease countless times, configured Network (TCP/IP) manually using info from hardwired iMac, (with the exception of the IP Address - used next sequential number for last three digits), Deleted associated .plst's, put a "$" in front of router password, (odd, but worked for others, not me!), deleted Network and Created new one, used "sudo ipconfig" command in Terminal, and still nothing. The darn thing is able to connect to the network but never to the internet. Each time by the way, I get the message: "Airport has a Self Assigned IP address and may not be able to connect to the Internet" (DUH!) But when I manually configured the IP I still could not connect the the internet, but was connected to the Network, well, Router.

As for the Router, I've changed the SSID, disabled SSID broadcasting, set up a WEP password, cloned my MAC address, entered MAC address of wireless iMac, changed the Router's IP, and I think that's it...

I am sooooo frustrated at this point! What am I missing?

Kurt, I'm ready to buy the longest ethernet line and hardwire this thing!

Holy Shirts and Pants! This worked!!! Thank you Lenn! But now, does this mean that my router is no longer secure? (Disabled Wireless Security in router config page in order to get my wireless on the internet.) Or does this mean that if someone by some chance figures out what the name of my router is they will then be able to hop on my network and connect to the internet sans password? Is there anything else I should do as far as security?

Well, a big Woo Hoo, anyway. Thanks again.