Zenith dvt412 Starting last week the volume on my system started going down by itself. I've taken the batteries out of the remote and it will still go down by itself over a period of a few minutes. I unplugged it and left it unplugged for a few minutes but still same problem persists. Any ideas?

Necesito el manual de instrucciones
please

Sounds like the system switch is broken. They use a piece of spring steel thats bent up to provide a snapping action (its very small). After years of continuous pressing the metal fatigue fails and breaks so there is nothing to keep the contacts apart. The most common button you will see this is in the volume up because its used the most. It seems that people usually adjust their volume up in more steps than lowering the volume as their ears adjust to the levels plus people tend to push the volume up button harder than the volume down.. There are a couple things you can do when this switch goes bad. There is probably a button on there that you dont ever use or could live without (loudness perhaps). You can take the good switch off that button and replace the volume button with it. You can do this by either desoldering them or by popping the clip off the switch and replacing guts. I have found it much easier to desolder them however because the small pieces are difficult to manipulate. If you dont want to lose the function of another button, you can try matching the switch with one from an electronics supply place like digikey, or go to a repair shop and ask them to replace the button or sell you a good button out of a broken face. Good luck!