I put my computer with a charger plugged in, and then next morning when I wake it up (either by opening a lid or unplugging the charger) the computer makes the sound from the optical drive as if it was booting up, but the screen remains black. The white led is on, but nothing on the screen. It even goes into sleep when I close a lid again and wait for few seconds, but it never turns the screen on. I am very frustrated because I have to force shut off the computer and restart it every day. I tried SMC and PRAM resent and didn't solve this issue. Any ideas on how to fix this issue? I have MacBook Pro Mid 2012 Base Model with Mavericks.