Today (02.09.16) I was updating the available security package on my computer when its battery died. Yes I know that all updates should be done with computer connected but I simply forgot and the system did not emit its usual low battery warning. The computer turned off whilst the install of the security package was occurring.
The thing is that when I turn the computer on it doesn't seem to be able to operate elementary. I say this because it does its start up procedure, "display the manufacturer logo and the screen with the white characters", I believe this is the BIOS. But once this is complete the screen simply goes to black and remains as such forever.
I do not have much computer knowledge but do enjoy elementary very much. The computer has important files which I need.