After installing, attempts to boot from the hard drive do not allow me to get past the Mint login box (or the auto-login if Nadia installed with that option). The Mint login just keeps refreshing endlessly. There is a thin magenta, vertical line at the left edge of the monitor. The monitor also has speckles and "hash" rather than readable text when first booting. Yet, the Nadia ISO used for installation worked and displayed fine on the monitor. I suspect there may be a video driver issue (NVIDIA GeForce GTX 660). Any ideas?