Click to Enlarge.So close
Strangely, while otherwise well equipped, the HC3800 has only one HDMI input. In this day and age, 2 HDMI inputs is pretty much standard (or maybe an HDMI and a DVI or M connector, but ultimately we're talking two digital inputs as the current standard practice. If you don't have an AV receiver with HDMI switching, you'll probably need to spend $40 or more for an HDMI switcher, if you have two or more HDMI sources (who doesn't)
The HC3800 has an RS232 port for "command and control" by computers, room control systems, etc. There's also a 12 volt screen trigger. Then we get to the actual inputs, which consist of a composite video, S-video, and component video (the usual 3 color coded RCA jacks for component video). In addition there's a standard analog computer input (the usual HD15 connector). That input can be used for an analog computer signal, or as a second component video inputs. Finally, on the far right, is the single HDMI 1.3 input.