Just a blue screen? No message or error?
Give us a little more information. How did you root? I'm assuming you found instructions online. If you give us a link, we can look them over to see if they were right for your device. Can you give us the model number? Do you by any chance remember the version of Android that was running before you tried to root it?
By the way, this is the area for older Galaxy S2 phones, so the procedures will most likely be a little different for the Grand prime. I'm looking for the right forum to move this to, so hang tight.
