[Discuss] stumped: machine won't boot

[dsr at randomstring.org (Dan Ritter)]

On Fri, Jun 26, 2015 at 08:39:03AM -0400, Laura Conrad wrote:
> 
> My desktop is a lenovo I bought last fall.  It has only ubuntu installed
> on it.  There is a 500M boot partition, which seems to have been
> clobbered.  The / partition looks fine, and in fact includes a /boot
> directory that looks normal to me.
> 
> I rebooted it a couple of days ago because of a new kernel, and it
> wouldn't boot.
> 
> It says it can't find an OS.  I have tried boot-repair,  and it thinks
> it has repaired things, but I still get the message about not being able
> to find an os.
> 
> The bios was previously booting legacy only, and I have tried setting it
> to auto and that doesn't change anything.
> 
> Any ideas?

Can you boot from a rescue USB or disc? Sounds like you need to
re-install a boot-loader (LILO or GRUB, most likely)

-dsr-