no signal

I'm new to the forums so I'm if I sound like an idiot, but my computer Dell Inspiron 3847 just decided to stop working, I was in WoW and the sound was still coming through but the monitors just quit, and no signal showed up and they quit, and now it keeps telling me the same thing, any help to get my game going would really be appreciated, and yes, I turned it off, tried turning it on and - no signal - tried doing the unplugging monitor, switching monitors, same thing, even did the pull power plug out and hold on button for 1 minute, same thing