Hi and welcome to UF
Lets have a look at your boot info script. If someone can help you, they will need this.
To post your boot info script, boot up to your live cd/usb, download the boot info script from the following link & save it to your desktop.
Then open a terminal (Cntrl+Alt+T) and run the following command...
This will create a results.txt file on your desktop. Open that file and copy/paste the info between code tags using the "#" symbol in the toolbar of your next post.
sudo bash ~/Desktop/boot_info_script*.sh
To put it between code tags, just click the # symbol in the toolbar & paste it between [CODE] [ /CODE] tags.