I am using dell-inspiration 14r,Last day, when I shutdown ubuntu, Next time It didn't boot, It said hard-drive not found, try reseating it. But It ,Again,could detect the hard-drive from boot menu.I tried many things, Nothing seemed to work. At last, I downloaded a booted lubuntu 13.04 and installed it. Now the grub bootloader menu comes up asking me which to boot. I changed boot option's from legacy to UEFI. Now In both the booting System, Ubuntu says that boot/efi is not ready, press S to continue.How to fix this error? Also How Installing lubuntu get's me to the login screen again?
Edit: I also found that when I try to boot in EFI mood, It tells
start pxe over IPv4 Now, When I enter to the boot menu I see at #1 Ubunt(hard drive not present) that is bios is not detecting My OS. So the problem here is, Ubuntu isn't been able to boot itself.That's why installing lubuntu I was able to boot. Now what should I do to fix this error?