Thanks for the help guys!! Well, my dad did some investigative work. The power supply unit was fried.
It's got 4 LED lights in the corners, and I took the pic without the flash, which keeps the shutter open a little longer, that's why it looks like that.
Oh, is it okay to leave the computer in stand-by mode whenever it's not in use, instead of shutting it down? Any pros or cons of this?