I understand what you're saying.
To tell you the truth, I found out what was the problem, I hadn't loaded the default settings in my mobo.
Now, I get to the boot menu, but after choosing the Mavericks, There's a black screen, it mavericks installer isn't loading.
trying the verbose, will let you know in a minute.
Still black screen, also in verbose mode.
It's like the monitor loses signal.
upload a picture here. with verbose mode.