Assuming you mean "Time Capsule", it's not clear what your question is. Is it working at all besides the yellow light?
A couple of things that might help find out what's wrong:
Do you see your wireless network -- or some generic one containing "Apple" in the name?
Does System Prefs > Networking acknowledge that there is a connection when you plug a cable in? (yellow or green light on Ethernet)
Do you get an IP address on either (not self-assigned)?