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Re: how to diable demo mode on mx-kb30
The "DEMO" mode initializes when power is initiated in the unit for the first tiThe me.You cancel it by turning turning the power on by using the button the unit or the remote.If you unplug the unit from the power outlet between uses, and plug it in again...it will go back to the demo mode.this can be avoided by leaving the unit plugged in between uses and/or install 3 AA batteries in the battery compartment in the lower rear behind the main battery compartment .these batteries are memory storage.it is not necessary to instal the 9 size D batteries for portable use unless you use it as a portable...I hope this was helpful...
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Make sure the unit is on. Press the FM Mode /Mute -Demo button (right next to the power) press it untill you get to either mono or auto (-for stereo). That will take the unit out of the demo mode. next turn the music jog dial (located just above the preset buttons) untill you get to which ever setting you choose. Hope that helps. ( I can't find the manual on line either- not even from JVC! )
Have it first cleaned by a cd disc cleaner or if you are familiar with cleaning the lens manually im sure that will work...or try inserting an original cd's,if it works with that find the solution to the settings of your device...
A desperate longshot but the only i have to offer:
It might be a problem with the electricity.
if possible try and install it at another location in your house, using other electricity sockets.
If the problem is solved by relocating the system, you might be looking at wiring problems (audio equipment can be very sensitive to that), if changing anything in the installation process solved the problem then the problem was probably due to bad grounding and "loose" electricity.
Try making the installation as "clean" as possible, avoid tangled wires and stressing a single socket with too many electric appliances.
If the problem persists, and you are still under warranty, I suggest contacting your local JVC dealer. If you're out of warranty I suggest locating a professional repair person.