Problems with the system started from the Live CD/DVD

At boot time or reboot of the PC with the CD/DVD media in the reader:

read carefully the section Start the system from live CD in the installation guide.
 * boots the operative system already installed in the PC or shows a message that tells that there is no operative system:


 * The computer stops showing messages on a black screen:

please inform us of the anomaly telling in the much detailed way what's happens from the boot of the computer and which messages are on the screen, even if they seems meaningless.


 * the graphical screen of openmamba shows up but nothing else occur
 * the system starts correctly for the first time but now don't start again
 * the system starts correctly