Since today morning the display is black (nothing happened, i.e. this happened out of the blue). While I could boot into Linux (I'm running Linux Mint 17 and Windows 7 as a Dual boot system), I tried to fix the display via hard reset. Since then, I am unable to boot into anything.
I've booted from a Mint 17.1 USB stick and tried the boot-repair tool, but to no avail. The two problems combined -- unable to boot, and display not working (maybe some hardware issue?) -- are pretty tough to deal with for me.
The pastebin from boot-repair is here: http://paste2.org/JOm86BFH
The thing I gather is that "The sda5 (Linux Mint 17.2 Rafaela) partition is still full. This can prevent to start it (e.g. you may get a Power Manager error)." but I don't think that this is the issue.
All help is greatly appreciated!