i have a Toshiba C650 laptop for a year and i had some problems with corrupted clusters in a partition and i tried to fix it by running chkdsk and change partitions which resulted into a not bootable laptop to windows 7. That made me decide to install ubuntu (an excuse) but still after many installs i get always a no bootable devices found during start up. The installation is flawless but no boot what so ever... I tried to fix the grub with boot-repair but nothing.
How can i see what is wrong? I suspect that the MBR is completely corrupt, is it true? Please help i don't know what to do :(