Buttons not working on JVC KW-AVX730

SOURCE: KW-AVX710 Screen stays black (off) untill I hit the open button

So I decided to verify all the connections after I got frustrated with it. Everything was correct except one wire that was on the new harness I got that for my car that was labeled "12V fused" (supposedly the key on power source). I tested it with my volt meter and it did not have power at any time, even with the key on. The constant power source wire was hooked up so that's why I was able to open the face and eject CD's and DVD's but not do anything else (like when your ignition is off). So I ran a new wire from my fuse panel and everything works now. Just like my Thermodynamcis professor says "nullius in verba" (take no one's word for it), just because the wire was labeled doesn't mean it's right! Hope this helps.....

SOURCE: Jvc kw-nx7000 won't turn on

have you check all your power source

SOURCE: I trying to get my SD Card to work for my JVC

http://resources.jvc.com/Resources/00/00/93/LVT1467-001B.pdf
try this web site - manuals for your stereo

SOURCE: JVC KW-AVX 800 "Position error"

Assuming that this is not a new install (the laser is secured with a long, thin brass screw when shipped, and this screw must be removed on installation), and the unit has worked before today, then we will troubleshoot from the "damage" perspective.

The laser isn't centering itself to start position.

This could be due to track binding (dust buildup) or just a hard jolt to the base (pothole?), but the first thing to try is a soft reset...and if that doesn't get it, then a hard-reset next.

*Assuming of course that one of the kids hasn't jammed something foreign into the slot and knocked the head off-track...it happens quite often.

Soft reset:
Most models have a tiny, recessed "reset" button that you can press and hold for 5 seconds with a ball-point pen, located under the faceplate.
This will restore factory settings, and re-center the laser.

If the error returns, a Hard reset:

Disconnect the Positive(+) cable from the car battery for at least 30 seconds, and re-connect.
You will likely lose all saved stations on the radio, but this is a last-resort to avoid removing and opening the unit.

9 times out of 10 this will solve any digital errors, and will free sticky tracks better than half of the time.

SOURCE: JVC KW-AVX706 front face problems

for ppl still having this problem.. more than likely the dash kit is to small and not allowing the radio to close properly. soulution: get one that fits, or get a dremel and shave down the plastic on the dash kit that prevents the radio from closing... hope this helps some1