Can I access my doents quickly from my computer which won't turn on?

I need to get a doent from my computer ASAP, but the computer won't turn on. The computer lights and fan turn on and it looks like it's on, but there's no display. My friend made the computer and I've had lots of problems with it, I'm not very tech savvy so is there a way to byp fixing the computer and just getting my doent? Preferably something a computer-illiterate person is capable of doing.