I have tried everything but it won't boot from the cd drive, Hdd or pen drive. I have tried bios 209, 208, and 207. Every time I flash a new bios I can enter to the bios settings but as soon I disable security and turn on cms it boots to a blank screen, even without any Hdd usb or cd. When this happens I have to force a restore using the pen drive with ctrl+home. I am out of ideas. Any help will be appreciated . Thanks in advanced.