Per RL, above:
There are devices available that can take an HDMI signal and churn out an RCA connectable signal. Give Google a try, they're usually about $25-$50....
He's right, these are out there, but....
I'd advise you to avoid this route, at least based on my experience with the audio/video version which provides stereo audio plus composite (?) video via RCA (red/white/yellow plug) from HDMI. I was trying to connect a video game console (HDMI out only) to an older TV (RCA only) in a dedicated gaming set-up for my daughter. I tried two different versions of this adapter and neither worked worth sh*t, even for a set-up where video and audio SQ was far from critical.
The first one I tried was cheap but had good reviews on Amazon. The second was cost a bit more, but was the highest rated version. So much for reviews. There may be better ones out there, but I'm not sure how to identify them.