My problem is that when I change position of lid, the monitor becomes solid blue(blank) and I should turn off and on my monitor to solve this problem.
But it's not just about changing lid position, it happens randomly in windows env.
There is a exception when I'm in a game.
plz help me what should I do?
Then it is a hardware problem. If you still have warranty, RMA the laptop.
Check with an external monitor if the same happens there. If not:
you can try repairing it by replacing the internal connection between display and motherboard. EBay or Amazon are good places for spare parts.
With YouTube you can find tutorial videos how to disassemble your specific laptop.