White screen at startup, won't go on when exiting form sleep mode

hey,
Since a few months I have a game, it's called FlightGear, and it's a free game. But then I started having problems with my mac. Sometimes when I've played FG, and put my mac into sleep mode, and waked it up, is showed my desktop, could move my mouse, everything worked, but I cant open anything. And I hear a sound form inside my Mac. And when I turn my Mac off and put it back on, it only shows a white screen with the same sound. I've done checks to see if my disk was OK, and everything was fine. But this just keeps getting worse!

Two different problems. The black screen when the computer runs fine usually means that the FL inverter or the LCD screen is defective and needs to be replaced.
Not going to Sleep when the lid is closed is a setting under the Advanced settings in the Power Options you'll find in the Control Panel. With the Advanced Power Options, you can set the actions of closing the lid when using AC or battery power.
In my case, when the computer is attached to the power cord, it is also connected to a large screen monitor. In that case, I want the computer to do nothing when the lid is closed. But if I am running the computer on battery power, the LCD screen is my main screen and I do want the computer to go to sleep when I close the lid. This will save me power if I am on a plane, at a coffee shop or at a friend's.

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White screen at startup, won't go on when exiting form sleep mode

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