Microcell has stopped working

Ok. If all lights are a solid green and nothing is blinking that indicates connectivity to AT&T. What kind of phone do you have? Depending on what rebooting means for your phone, I would turn it off completely, wait a bit, and then turn it back on. It could be that your phone just needs to re-establish it's connection to the MicroCell and put it back in what's called it's "cellular neighborhood". How well does your phone connect when you are outside of the MicroCell range?

Hmm, I don't know why this is an acceptable solution if your phone still doesn't connect. Have you tried a hard reset of the MicroCell?

They are listed in the Tech Guide (see link in my sig). What you want to do is disable the power to the MicroCell. Take a paperclip and press in the button on the back of the MicroCell that says Reset. Keep holding in the reset button while restoring power and keep holding it in for about 30 seconds. Release the button and let the MicroCell got thru the Initial Activation process. Again, see the Tech Guide for what happens during the hard reset process.

Sorry I didn't get back to you sooner but I do take breaks from the forum from time to time.

By the power cord do you meant the ac adapter? Please be specific. If you replaced the ac adapter you need to replace it with one of the same power rating or you will eventally have problems again. Your setup is a little confusing in that you say you aren't using your old modem only the router now. I take it you have a gateway which is a router/modem combination instead of a separate router and a separate modem. It's not uncommon for ISP provided equipment to not play nice with the MicroCell because they are usually configured specifically to work with the provider and not necessarily the MicroCell.

Checking the ac adapter is one of the troubleshooting methods we recommend and there is an easy way to check if the ac adapter is failing. All of that is in the Tech Guide (link in my sig).