If that is the case, I suspect that the system isn't picking up your HDMI hardware?, try running the following commands which may/may not solve the hardware problem for you?:
sudo apt-get --fix-missing install
The above command downloads and installs any missing packages on your system.
sudo apt-get --fix-broken install
The above command downloads and installs any broken dependencies on your system.
Did you install any graphics card drivers?: