I have a MSI Multimedia TV@nywher and all I get when I hook it up to my VCR is a blank screen. I can't even get it to register that it's plugged in to a tv. Anybody know how this thing works?

This is the same issue im having with my hp tv tuner. If I hook up my composite cables from my cable box it shows on my lap top and i can change channels- record live t.v -pause- rewind.. But when i hook up my wii it doesn't register a video either!!!!!!! Im not sure why but i think it can tell the difference between a cable box signal and a wii signal but im not sure. Im still trying to figure out a way around this so if i do i'll be sure to post it here to help out anybody else that is frustrated by this issue!!!!