No sound whatsoever on my dvd player.

These units have a remote which provides controls not on the player itself. Be sure to check that the mute is not on. The other obvious question (but it still needs to be asked) is have you checked the volume control setting. When you move the control do you hear static or anything over the speakers which could indicate a bad volume control. Have you checked audio with headphones? If you have sound with headphones then you may have a loose connection in the speaker wiring or the headphone jack may be malfunctioning.