Stuck in powersave mode

The other day my roommate came into my room and ripped out the internet connection. (not literally) however, ever since he did that, i'm sure he unplugged lots of other things not knowing what he was doing. Now when i restart or turn on my computer, usually it looks as though it is starting up normally, then the monitor light turns orange, the keyboard lights go blank and when i push a button on the monitor it says "in auto save mode, press any key on the keyboard or mouse to continue" yet nothing happens. I know nothing about computers, so all i have done is google searched some stuff, changed my display settings but nothing helps. Right now the screen is all garbled and some areas are hard to read. What to do?