Laptop will not boot topic

Hi
Sorry to bother you guys, i have a paper due monday and while its done
laptop that was working fine now will not boot
I do not dual boot, solely run ubuntu 14.04

i get the screen listing installs and recovery loads
i can select them but nothing happens

have been reading thru grub posts but having tried most i get errors

sudo fdisk -lu

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sda: 750.2 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/sda1 1 1465149167 732574583+ ee GPT
Partition 1 does not start on physical sector boundary.


tried installing boot repair that also failed
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair

download failed, so unable to run

Not an expert and not making any headway on this
HELP!!

I will be online reading as you post so i can get this resolved asap