Turn on WDTV Live and get nothing

Thanks.

I connected the WD TV Live via composite lead and it works.  I can watch videos as usual.  Thanks.

However, I need to get the HDMI working.  I have 4 HDMIs and just one composite that I use for something else.

How exactly do I set “the HDMI manually”?

How can you set HDMI when you are using composite?  The setting just goes back to composite.