OK, so I recently bought a Sapphire Radeon 4830 to replace my NVIDIA 7300 LE that came with my desktop. When I uninstalled the NVIDIA graphics card and put in the new graphics card, Vista booted, but the screen was black. I replaced the new card with the old one, but the same thing happened. I hear the sounds of Vista starting up, but the screen remains black. Any advice?
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