If your DVD player also has other outputs then you may have to change the av output to HDMI in the DVD menu. You can try hooking it up to an AV input on the TV to do that and then reconnecting it with HDMI.
If your DVD player also has other outputs then you may have to change the av output to HDMI in the DVD menu. You can try hooking it up to an AV input on the TV to do that and then reconnecting it with HDMI.