i had the same problem. it’s slightly different with everything, but this is how it usually works;
1. plug in both cables into the right places in your ps3 and tv.
2. if you are just getting sound when you switch your tv setting to HDMI, go back to your normal settings, and switch your ps3 display settings to HDMI.
3. it should now display video as well as sound
hope that helps References :
i had the same problem. it’s slightly different with everything, but this is how it usually works;
1. plug in both cables into the right places in your ps3 and tv.
2. if you are just getting sound when you switch your tv setting to HDMI, go back to your normal settings, and switch your ps3 display settings to HDMI.
3. it should now display video as well as sound
hope that helps
References :