Q:

Can't type the password while logging in the Non-Graphical interface (Ctrl+Alt+F3)

I have managed to log before, but now its different. I can type the Login normally and press enter. It asks for the password. But what I type is not displayed on the screen. I have to press enter, what moves it one line down, to start typing the password. Because of that, the password is seem as "incorrect". If I dont press enter it just wont display my password on the screen. 
PS: Even trying to type it on "invisible" wont let me in. 
PS2: I can log in the Graphical interface without a single digit problem.
What might be causing the problem?

A:

The comments have already provided the reason for not seeing what you type.
The Login incorrect response you are seeing is a result of typing information that doesn't match.
Since you are able to login the GUI without any problems, then you have a correct matching username and password.
To use the Ctrl+Alt+F# console terminal (a TTY Console) you'll have to put the exact information.  The username is case sensitive.
The Username you see on the GUI is a friendly name version.  It's almost never the same as your real Username.  While logged in the GUI use this to find the exact spelling of your real username.

First hit Ctrl+Alt+T.  From the terminal type in this:

$ whoami

It will show the exact spelling of your username.  Use that on the TTY console and carefully type in the password (which won't echo), then press ENTER.
If the username and password is exact, you will get a login prompt.

