Toshiba Satellite not working

Hello,
I had my laptop running for a few days, gave it ample exhaust room and battery, and I've done this many times before. This last time, after I shut it down, it doesn't seem to start back up normally. I'll turn on the power, and the backlight for the keyboard turns on, and tthe ring around the power, I'll hear the hard drive disks spin up, and then it just sits like that. Notice I didn't mention the screen. Thats because it dousnt turn on. Would I call this a hard drive problem, a screen problem, or another problem. I haven't done anything to it since it turned off, so there shouldn't be anything going on like this. I've also tried to connect to external displays, and also it does nothing. No signal.