This sounds like a problem with your video card. From the output of lspci you've got two video cards, one Intel onBoard and one nVidia.When i run the ubuntu without recovery mode it gets purple for 15 secs and then black and that's it.
How do you switch between them? In the BIOS, perhaps? When you're able to switch via BIOS, switch to the onBoard one. When you're not able to switch like that, crawl down and remove the nVidia card from the slot and then boot.
After booting a regular system you can prepare for using the nVidia card.
I hope this helps you a little bit, but I confess I don't know too much about this new graphic cards of ATI/AMD and nVidia and how do you configure them in Ubuntu. But I'm sure folks in here know how to do it.