Dota 2: Can hear soun but can't see the display/video

[animoso]

I installed Dota 2 game. When I run the steam app, clicked "Play game", it says preparing to launch then I assume
the game launched because I can already hear the sound. BUT problem is, I CANNOT see the video display.

I'm using Sapphire ATI Radeon HD 5670 ddr5, using Phenom II x4, windows 7.
ALready, updated the driver of video card and still no luck.
Can't see where to disable 3d acceleration.

 

[Andrew Johnson]

Do you get a black screen when you launch the game? If so try uninstalling Dota 2 and restarting your computer. Then try re installing the game.