We purchased several sets of these headphones to use in our vehicle with an after-market DVD player. One set of headphones suddenly produces no sound at all. We have changed the batteries and have checked for correct battery installation. Any other suggestions, as these are not much more than a year old and I hate to have to purchase a new set. Thanks so much!
My set has an led that glows red when on...if batteries in correctly, and switch on...do you have a red "POWER" indicator. If yes, & still no sound, 1-does the other set work? 2- either side of prob set work? 3-VOLUME up all the way? Could be bad receiver/bad speaker(s) bad vol switch.
IF no POWER led on, then 1-bad batteries 2-bad power switch 3-broken internal power lead/wire.
Kids are rough on these things...any sign was dropped, or dunked in a coke? REMOVE ear cushions are screws if yur inclined.... sk
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Hello  Insert the batteries into the Craig DVD player. Depending on the model you are using, the batteries are either rechargeable lithium-ion batteries or store-purchased AA batteries.  Plug the 3.5mm cable into the headphone jack on the side of the Craig DVD player  Insert the opposite end of the cable into the "Aux" connection on the car stereo. Without this audio-input option, you will be unable to hook the Craig DVD player up to your vehicle.  Power on the Craig DVD player and insert the desired DVD. The video will load onto the display screen while the audio is played through the car's stereo system. 
Hello... I am sorry to hear you are having problems. I am unsure if you bought this as a package deal with the headphones or purchased the headphones separately. If you purchased them separately, they may not be compatable. Headphones come in different frequencies. The reason for this is if you had 2 different dvd players and 1 kid was watching Spongebob and the other kid was watching Hannah Montana, they would not interfere with each other as far as sound. Some dvd players will allow you to change the output frequency of the IR (infrared) transmitter built into the dvd player. This feature would be in the menu section of your dvd player. Make sure the headphones are on properly, because if they are backwards, they may not read, because IR frequencies are "line of sight" meaning the receiver (headphones) has to see the transmitter (dvd player). You will see a tinted window that has 3 or 4 bulbs. That will be your transmitter. Make sure you have good batteries in the headphones and that you have them turned on. If you have power and have checked the IR frequency, and they were purchased aftermarket, then you may need a different set that receives the correct frequency. If this is a package deal and you have checked the batteries and they power up properly, you may have a bad IR transmitter inside the dvd player. With the info you provided I can only speculate at this point, but this gets you on a start. Let me know if I can help more! Good luck with your venture!!
I don't know what type you have...However, Audiovox makes a wired FM modulator that plugs into the back of the radio (wired from the DVD player) that permits the DVD player sound to be heard through the vehicle's sound system. Relatively inexpensive and simple to install. I hope I've helped. If so, please rate my assistance and leave a comment to help others. Thanks and good luck.