Linux Mint low graphic and CLI doesn't work

[vasiauvi]

Hello all,
This is my first Linux Mint Forum topic.

After some files update (I don't remember what files unfortunatelly) my system is broken with error "Linux Mint is running in low-graphic mode configure graphics". I wanted to try sudo dpkg-reconfigure xserver-xorg but pressing CTRL ALT F1...F6 doesn't enter in CLI. I see the blinking line but pressing the keyboards nothing appears.

I have made a video where is seen that also choosing the options from the "Linux Mint is running in low-graphic mode configure graphics" has no effect.
http://www.youtube.com/watch?v=34KCYmIO2rI

I don't have any idea how to bring the CLI up. Maybe somebody has a solution?

Thank you!

[EDIT] More detailes:

- I had updated my system (I can't say what files were installed)

- restarted and the system entered in "low graphic mode" but no options from menu are working. I have made a video (bad quality but to get the idea) http://www.youtube.com/watch?v=34KCYmIO2rI .

- I have made Bootable USB stick with different distributions like Puppy, DSL, Fedora, Ubuntu also tried with Live CD (Ubuntu) but I get errors and the system remains in "standby". Here I have made pictures of the errors:
http://i.imgur.com/jlQiH.jpg Linux Mint
http://i.imgur.com/SLJZG.jpg Fedora live USB
http://i.imgur.com/lacAt.jpg Ubuntu Live CD

- conclusion until now is that I can't manage to boot with LiveCD or USB stick although with Puppy Linux it worked but I couldn't mount the ext4 drives but the ntfs drives were mounted corectly.

- the tty doesn't work that means that I can't write something like: sudo dpkg-reconfigure xserver-xorg

- I have dual boot with WinXP. Entered here and installed Ext2explore and Ext2fsd at least to back up my files from /home.

When entering on /root partition with Ext2fsd is asking me if I want to format it. I didn't continued but as final resort can I format the /root and try again to install from scratch a new distribution? My /home partition will remain untouched hopefully.

Someone knows a reason why I can't boot or why even the Live CD gives errors? I have used more than one live cd and more than one bootable usb stick.

I don't se on my system file /etc/X11/xorg.conf but is xorg.conf.failsafe. Here you have an archive where I managed to save xorg.0.log and other files: http://dl.dropbox.com/u/1518616/xorg.tar. If you can please tell me what other files are relevant to save to place here maybe it's shows clues why this is happening...

[SiKing]

Can you access the menu? Under applications look for "terminal".

[vasiauvi]

Can you access the menu? Under applications look for "terminal".

Hello,
No, it's not possible to access the menu because I don't even manage to enter in gdm, it's remains only with the options from the "...low graphical mode..." or black screen.

If I backup the Xorg.conf file (with a Live CD) and do a restart an other Xorg.conf file will appear as default?