unexpected error on airport time capsule

You will not be asked for a password if you reset the Time Capsule back to factory default settings.....as you indicate that you have done.

Please perform a Factory Default Reset on the Time Capsule again.

Then, on your iPhone.....

Go to the Home Screen

Tap Settings

Tap WiFi

Look for a listing of Set Up New AirPort Base Station

Tap on Time Capsule and setup "wizard" will guide you through

The example below shows an AirPort Express that has been reset back to factory default settings, but you will see Time Capsule on your iPhone screen.

Unfortunately, it is not looking good.

You can try a few more factory default resets on the Time Capsule, but if you continue to see the error message, the Time Capsule is having problems, and it is time to take the Time Capsule to an Apple Store.....if you have one near you....or contact Apple Support directly.

We need more information to be able to help.

Is this a new Time Capsule that you are trying to set up for the first time?.....or.....has the Time Capsule been working OK and you are trying to make a change to the device?

If you are trying to use AirPort Utility on a Mac, what operating system is the Mac running? If you are not sure, click on the Apple icon in the upper left corner of the screen, then click About This Mac and post back with the OS X Version number that you see there.

If you have an iPhone or iPad, have you tried to use AirPort Utility on that device?

Have you performed basic troubleshooting steps like powering off the Time Capsule and your Mac, and then powering them up again?

Do you have another device......another Mac or an iPhone / iPad.....that could be used to set up the Time Capsule again?

Which is it.....another Mac....or an iPhone / iPad?

If it is a Mac, can you try that device?

If it is an iPhone / iPad, should we assume that you know how to set up the Time Capsule using that device?

What happens when you use the iPhone to set up the Time Capsule?

We assume that you know how to do this.....since you did not answer our question about this in our previous response.