My old TV had 3 HDMI ports. My new TV has 2. The cable box is connected to HDMI 1 and the home theater receiver is connected to HDMI 2. I need to be able to connect my Roku to a third HDMI port. I bought a splitter but it didn't solve the problem. I need something to give me extra HDMI ports that all work at the same time. I would also like to connect my PS3 as well. Does a device exist that will provide extra HDMI ports?