I have Sylvania TV with a built in DVD player. When playing the TV its has pictures and sound but when playing the DVD it also has picture but NO sound

SOURCE: No picture while playing DVD or VHS tape

Your unit has it seems to have developed a video problem. it could be in the video switching IC or the video processor. Its going to need a trained technician, who knows how to use an ocilliscope to find the video problem.. Good Luck

SOURCE: No sound from digital cable thru AVR3200 after adding HDTV - DVD plays fine

you need a digital coax cable and then connect it to 6.1 also the digital cable type is not a coomon type so check that also

SOURCE: No sound from built-in DVD player on TV?

It sounds like the audio cable from the DVD drive may be loose or damaged. Did you wall mount the TV and this is when the problem started or has it always been like this? If its under warranty, contact the helpline on 0871 2000 463, be warned, if its becuase the cable is damaged by a wall mounting screw, its clearly evident and they will charge for repair.

SOURCE: I have sound but no picture

it does not support pictures

SOURCE: I have a 32

This is a backlight or inverter Problem. Based on the model you have, I am guessing the inverter is defective.

Inverter is defined as the board in the TV that supplies power for the flourescent lights inside the LCD TV that provide backlighting for the TV's Display