Hitachi CMP4203W Plasma 42" set question.

[dr.ido]

I'm not familiar with that model number, but I suspect it may be a commercial variant of the 42PD5000 or similar. Googling your model number gets me listings for boards I have seen many times - I've fixed a lot of those power supplies.

Assuming it behaves as a 42PD5000:

These only have a DVI and VGA input on the unit itself by default. For domestic use they were normally sold with an outboard "media box" that contained an analog TV tuner and the usual complement of AV and component video inputs and outputted DVI.

As others have suggested you can feed component video into the VGA input. You will need to go into the settings menu and a select component. From memory there is also PC / not PC setting. If it's on PC it will only be expecting standard PC modes.

You can feed HDMI into the DVI input with an adapter. They don't do HDCP and some sources don't correctly ID them. Manually set the source to 480p RGB if possible.