Well, I was going to birthday gift my spouse a functional in-dash navigation system in the fit. That was the plan up until I found the new one I bought on amazon didn't actually have the proper wiring harnesses with it, despite claiming it did. Okay, that's a return then. Start looking at new in-dash units from crutchfield and get annoyed at the only not-stupid-expensive one loses the steering wheel audio controls.
Since I had the old unit out, I started tearing it apart. I mean I've decided to replace it and I wasn't planning to put the dash back together until I get the new unit install and I haven't quite clicked order yet.
Yeah, dvds don't do well when there's the top half of the spindle has fallen off and attached itself to the laser's tracking magnets. Apparently the red dust that kept collecting on the nav dvd was the drive slowly grinding the top spindle's plastic mount to dust. There's a cd player in the head unit too, but cd only so I can't just swap it for the dvd... but it did have the same loading mechanism. This doesn't bode well for not having the same thing happen, but hey, if I can revive it now the car may rust out before the dvd dies again.
So I managed to fish the top half of the spindle out of the cd and swap it to the dvd drive, all without actually disassembling the drives. Reassemble everything with only a few screws left over in the head unit's many-dozen screws, plug the thing back in and turn the car on. Lo and behold it boots. I didn't mess up any of the dozen ribbon cables with friction attachments, nor did I short anything (and I was working on the floor, no static mat in sight). I build my own PCs and repair our laptops and phones, so I do have some idea what I'm doing inside electronics. But I wasn't "good" about this one (static mat, laying things out so I could reassemble properly, etc). I tore it apart because I wanted to know what happened. I wasn't really planning on being able to attempt a fix.
It took a bit of work to find the nav data dvd. First one goes "you upgraded to a newer version, you'll need that." Great. Then spouse turns around and spots the newer dvd sitting on a garage shelf. Drop that in and it boots! It is fussy about not finding gps, go outside give it up to 10 minutes but it seems to work. I had to set the location (thought it was in LA -- uhhh no) but it seems fully functional. iPod input works, radio works, does seem to track gps as I puttered around the cul-de-sac.
So, um, yeah. Thanks amazon seller for having the wrong wiring harness you saved me a couple hundred bucks!