Time Capsule backup works but internet doesn't

I use my Time Capsule as my wireless router and while Time Machine seems to backup wirelessly just fine with my MacBook, as of yesterday the wireless router (Airport) portion of the device isn't working. I know my modem is fine because when I connect it directly to my MacBook, my internet service works. I'm just not getting the wireless internet signal through the Time Capsule/Airport device. When I check it with the Airport utility it tells me that my "wi-fi base station does not have a valid IP address. I have no idea how to fix this. The amber light on my Time Capsule is blinking.
Thoughts?
Thanks.

Hi JaschaW,
Can you try to update me with more specific details. The only idea I can think of now, is for you to :
1) Open System Preferences>Network.
2) Click on Airport, go to TCP/IP.....check if there's any setting being set to Manual on the IP address part.
OR you can try doing this....
Shut down your mac.
Switch it on back......now quickly press the Apple Key + the "S" key. Hold it there, until a black screen is prompted. It will prompt you to type a command, in order for you to proceed to boot normally. Do that....after that another prompt....type "exit" without the inverted comma.
Try that....let me know if it works....
Cheers
Shean

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