I don't have a system with a restore system built in, but your user manual, or the Dell site should describe what you need to do. There may be a special F key you need to hit during boot or a utility in the bios used to restore the system.
There have been situations where a bad battery was causing a problem. You might take the battery out and try without it.
And remember, hitting an F key during boot can be very touchy. If you are not tapping it at the right time, you will not get the screen you need, but I have seen you situation before. In my case I was able to delete a driver from the command prompt to get the system working again.