Hey everyone. My old hard drive died, so I took it out and installed a new one. When I trying booting my computer, it shows that it does recognize the drive, but wont go any further than a black screen with a flashing underscore in the top left corner. The computer didn't come with any disks, so I couldn't try that, so I'm just wondering if anyone knows what may be causing this? Any help is appreciated. Thanks so much.