Can you please get me the model number off the back of the TV?
Also, the model number of the DVD player?
How are the two devices connected (with what type of cable)?
Someone swapped a cable around on you.
Is the unit connected using Red,White and Yellow RCA type cables?
Okay, what you want to do is go around to the back of your TV, and follow the RWY cords from the DVD. Make sure they are plugged into the jacks labeled either Video 1, or AV 1.
The jacks will all be in a row grouped together.
Then use the Input/Device/Source button on your remote to get to the proper input that your DVD is on and you should have both picture and sound.
This is going to be very hard to do on the computer. i will have to opt out and perhaps another expert can assist.