I had windows vista installed on my laptop and installed ubuntu 12.04 next to it, everything worked, then i installed ubuntu 13.10 and it worked. A few weeks ago i wanted to install 14.04 alone on the machine but it ended in
"Operating System not found"
I tried to fix it, followed many suggestions i could google, used boot-repair, tried to fix grub manually, but nothing helped. Finally i even exchanged my harddisk becuase i thought - maybe something is just broken.
Now i intalled a 120GB SSD, followed the default installation instructions again but the same problem. The installation completes successfully and after reboot
"Operating System not found"
Here my latest result from bootrepait: http://paste.ubuntu.com/8015123
I burned a installation DVD from Ubuntu 14.04.1 64 bit image My Notebook is a Fujitsu Siemens Amilo Si 3655 Centrino / 64 bit / Intel Core2Duo P8400 2.26Ghz / 4GB Ram / installed 120GB SSD / Intel GMA450 graphics.