Laptop Model: Acer Aspire 4745G Graphic Card Model: ATI Mobility Radeon HD 5470 512MB OS: Windows 7 64 bits Problem: Laptop starting to turn to blackscreen constantly since last week. At the beginning it still manage to back to normal after restart. But then after few days it turn to black screen during every startup whenever it progress until window start-up animation, I can even still hear the welcome sound although the screen is black. I can still using the laptop through safe mode. After that I google for some related solution and found that it's probably the graphic card (display adapter) problem. So I disable the graphic card (Radeon HD 5470) option under display adapter and it goes perfectly well. But when I enable the graphic card option under display adapter in normal mode, my laptop screen will turns black again (back to previous problem). I tried to uninstall the graphic card under display adapter and reinstall the graphic card driver (download from Acer Support) but the problem still appears. The graphic card driver after reinstall is appears to be ATI Mobility Radeon HD 5400 series instead of previously ATI Mobility Radeon HD 5470. Is it normal or I download the wrong driver although it's from Acer Support? What should I do to solve this blackscreen problem?