Help! Cannot boot past bootloader unlock warning.

I unlocked and rooted my device. Everything was working fine until I rebooted the device. The device would boot up, but after the Motorola start animation I had a blank screen. I tried using the return to stock tool, but the results were the same. So I booted into recovery and wiped everything, then booted into the the bootloader, and tried the restore to stock tool again. Now I cannot get past the unlocked bootloader warning? Can anyone help me with this? Thanks