Now, I know there are several threads already about bootlooping, but I could not find one with my particular situation. I received my Droid Razr from my uncle, and after doing a full factory reset, I found out it was still rooted from this article: Motorola Included a Root Check in the RAZR, RAZR MAXX, and DROID4 With Ice Cream Sandwich.
He did not make a backup ROM. I really don't have a clue what to do in this situation, so I just thought to myself, "If I restore it to a previous version of Android ROM from the internet, I can just update to a newer one." (I forgot to mention that the only reason I wanted to unroot was so I could get the latest update.) Well, I tried to do it using this:How to Unroot/Unbrick Your Rooted Droid Razr Back to Android 2.3.6![6.12.173]
(Just search for it because I can't post links.) But now it just loads up the Motorola logo and the dual core text, and then goes black. The screen is still on, but nothing happens. I am able to get into fastboot and recovery, and have tried a factory reset, but nothing works, and I am afraid to try anything else in case I ruin it even more. Can anyone help?