If your server is configured without a local graphics console, you need to install one in order to install the system and to run diagnostic tests. For background information, see "About Setting Up a Console".
Alternatively, you can attach an ASCII terminal (or modem line) to the system's serial port; see "How to Attach an Alphanumeric Terminal".
To install a local graphics console, you must have:
A supported PCI-based graphics card
A monitor (CRT) with appropriate resolution
A Sun-compatible keyboard
A Sun-compatible mouse and mouse pad