I have an Asus Q400a laptop that is about 2 years old. About 6 months ago I started to have a problem with the back-light on the laptop turning off and on randomly. I would be surfing the web, taking notes in class, or just listening to music and it would go black, but if I shinned a flashlight on the screen, I could still navigate through programs. It went away until now. Now sometimes the back-light goes out and sometimes it does what I would call a soft crash. The screen goes black, keyboard restarts and it takes me to the home screen where sometimes I can log back in and continue my work. Sometimes the screen will just stay black and only the mouse is responsive on the black screen. Other times I can get to the login screen and the mouse is responsive but the keyboard wont work with the exception of the dash/underscore key (tried external keyboard as well). Lastly, sometimes it will continues to crash so rapidly that I have to wait a while before I can shut it down properly. I'm not sure if this is related but when my computer isn't plugged in, it is disabling my network driver (I have the correct settings for it not to disable for power save reasons). I think I have narrowed it down to a hardware problem since I am currently using the HDD in another computer and have not had a single problem. I'm not sure where to start troubleshooting though. I downloaded CPUID HWMonitor but none of the heat levels look like they are high enough to be causing the problem. I also checked the fan for dust and debris and it is completely clear.
This is my first time posting in a while so if you need more information regarding my computer, let me know but here is the basics:
It's hard for me to give exact info since I am using the HDD in another computer right now but I'll do my best.