In my case I enabled UEFI and then booted Ubuntu 12.04 from a USB drive created from Windows 7. I choose "Try" in Grub and when the Unity desktop was on the display I pressed one of the bright keys. Then the desktop hung up. After that I pressed the power button for a while in order to shutdown the system and when I turned it on it had been already bricked.
It's a pity this laptop is affected by this bug. I really like it and I would consider to buy another model from another brand if the support service doesn't repair my laptop.