The power went out and and now my airport express's signal won't show a connection to the internet. When I plug the ethernet directly to my laptop, it works fine. Only when I try and connect my modem to the airport do I have issues. I suspect from my browsing that there may be an issue with the IP? But I really have no idea how to address that. I have very little technical knowledge with computers in general so any suggestions would be appreciated.
I did try unplugging the modem and the airport, then connecting the ethernet to the airport then turning on the modem followed by the airport. A few times. This didn't seem to help.
Does your modem have a battery? - if it does then you have to unplug the modem, pull and replace the battery and plug it back in - wait until it completly boots and then power-up the Express - if this doesn't work, what is the light on the Express doing? - and you should be able to check the Express by plugging the laptop into the ethernet port and opening the AU - it will tell you what errors are showing.