Hooking up PC to TV

Art - Jun 23, 2012 at 12:06 PM
I have a single HDMI connection on both our TV and our PC. The TV connection is already being used to connect to our cable system. So I bought a splitter for it so I could plug both the cable system and the PC to it. Whenever I turn on the PC, however, the TV goes black. Am I trying to do the impossible or are there some setting changes I can make to correct this?