My Jensen VM9510 in dash unit is having some issues with the sound on CD/DVD mode. Radio mode and TV mode are working great but when I turn to CD/DVD mode the sound coming from the speakers are making a loud hissing and crackling noise. Visually, it plays the DVDs and CDs great but the hissing and crackling are louder than the music from the discs. Does anyone know what may be causing this?

Do the DVD copies play normally in any other DVD players (besides the recorder you used to make the copies)? If not - it's because you didn't "finalize" the DVD copies. The last step in preparing a recorded DVD to play in all DVD players is to "finalize" them. This adds a "menu" and closes the DVD so that nothing more can be written to the tracks on the DVD itself. If you don't finalize your copy - it will only play back correctly on the device that recorded it. When you insert one of your DVD copies into the car DVD player, does it attempt to read it and then tell you "No disc" or "error." If so - your DVD copies are probably not finalized.

If the DVD copies play normally in other DVD players EXCEPT for the Jensen car player - then either the recording format is not compatible with the Jensen car DVD player, or the player itself may be defective. Does it play pre-recorded DVDs OK? Could be that the car DVD player's laser lens is dirty/dusty, or the laser output power is reduced to the point where it cannot read the tracks on the DVD.