HP Envy TS 15 :: Power LED Shows Up But Fans Not Running And Screen Does Not Come On

HP Envy 15" TouchSmart laptop running Windows 8.1. This is a problem that just started today, it has to do with the screen and fans where the Power LED lights up white, just as when the laptop is running properly.
 
My laptop was opened and turned on, functioning properly. I had NetBeans IDE running since I wanted to work on the second part of my current CS 137 (Programming Principles) assignment. Because it was almost time for my lecture, I closed the laptop by simply moving the screen back down onto the keyboard, where it goes into sleep mode. (Anytime I flip up the screen, the laptop is supposed to come back on, and the login sliding screen from Windows 8.1 shows up.)
 
When I took my seat for the lecture, I wanted to spend a little bit of time to work on my programming assignment. However, upon flipping the screen back up, instead of having the login screen show up, I encountered the problem: the Power LED is showing a white light, but I can't hear the fans running from the vents on the left side of the laptop, and the screen does not turn on. I did try to hold the power button for several seconds, and once at least 10 seconds, except that the Power LED keeps on showing a white light. The light for the Wi-Fi board does not show up.
 
Whatever it is, I don't want to pull the battery out because I did do that on my last laptop, and it was from there that I couldn't turn the old one back on again. If I pull the battery out from the Envy laptop, it'll short-circuit the connections from the battery to the computer, and thus several components will fry. For now, what I'm doing is leaving the laptop as is to drain the charge on the battery. And then, once I notice that the Power LED does not show a white light anymore, plug the AC adapter, then try turning the laptop back on using the Power Button.