Your DVD player is likely sending signal to your HDMI splitter (located in the cupboard above the fridge in my 23TR). I would check to make sure all your cables are securely anchored into the splitter box and then I would run through all the available "input options" using the controller on your bedroom TV. My recollection is that my main TV shows the DVD while on HDMI 3 but bedroom is HDMI 2...
__________________
|