AFTER INSTALLED POWERCOLOR ATI 5450 2GD DDR3 GRAPHICS CARD ,MY PC NOT WORKING PROPERLY. AFTER BOOT IT SHOWS BLANK SCREEN. AFTER MANY RESTARTS IT BOOTS. AFTER UNINTALLED GRAPHICS CARD I FACE SAME POSITION BLANK SCREEN.
Please don't type in caps , in a forum like this when a post is typed in caps it means the person is yelling. That's not going to get you an answer any faster or a better answer. This is also the Windows 7 forum saection and you may get better answers in the graphics card section.
Are you connecting the monitor cable to the video cad and not the motherboard ? What cable are you using for the connection ? Did you connect the power cables to the video card ?