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Re: volume wont change
Unfortunately these units require the remote to adjust volume visit www.remotes.com they have the remote for mvohd70 (the infrared headphones have volume on sides) if it is RCA cabled to your head unit you can control sound in car but if you are referring to the direct headphone jack remote is the only solution
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The most likeley problem is the cable that runs from the LCD panel down to the main printed circuit boads has become faulty due to the way it can be adjusted to enable better viewing. To ensure this is the problem, use the dvd player on the video output mode, so that you can connect to a tv and merely use the dvd player, as just a player, not also a screen.
If you find it still doesnt work you need to replace the mpeg printed circuit board, it has all the video and volume controls on it.
If you find it does work, you need to either replace the LCD panel or the LCD panel assembly, which also contains the cable that runs to the mpeg printed circuit board. Also check that the video setting is set to display video on the portable dvd player screen, I have seen many units and times when that was the main cause of the problem. I hope this helps. Good luck.
get a splitter that allows you to plug 2 sets of headphones in the portable dvd player.
The sound is the only place were this machine falls short. The sound is okay at best with the built in speakers, but any background noise makes it nearly impossible to hear anything from them even with the volume all the way up. Not surprising since due to the size of the player the speakers are only a little bigger then headphone speakers, but with headphones or portable plug-in speakers the sound is superb. Besides the sound the only 2 complaints are that you can not control the volume with the remote and that the power switch is too easily turned on by accident (do not travel with the battery attached or you will find you have no charge when it comes time to watch a movie). The battery lasts 3.5 to 4 hours, long enough for 2 short movies or 1 long one. -------------------------------- also checkout The volume button is on the right side of the uint. -------------------- , headphones are a must, or get a device to play the audio through your car stereo ($15-$25). The player has the option to either input or output the A/V so you could play video games on the run or you could hook up a VCR and watch VHS...be creative
Go to Radio Shack with your DVD player and manual if possible. They need to know the voltage and weather it is ac or dc. Radio Shack handles all types of charges ( ac adapter ), and will have the one you need.