http://shop.panasonic.com/shop/model/DMP-BD75?t=manuals&support#tabs and on page 8 shows a connection to OLD SCHOOL COMPOSITE VIDEO AND AUDIO. As we know, that would work without the TV being on.

I will defer to the web what composite and such is, as well as any setup/support but this is one rare player as almost all others must have the HDTV turned on. As this supports the old standard, it can do it.
Bob