Peelee

I've been looking around the internet for hours, and can't seem to find my problem reproduced exactly.

My screen reads "Please check your disc."The entire console is bricked - I cannot play radio (satellite or AM/FM), can't play CDs or tape, can't access any menu, I can't even change the clock. I have access to the AC, and that's it. I checked the navigation DVD unit, which cannot eject the disc. It looks like there is a small light cover near the eject button, and this also is not working. This has led me to assume that the disc drive itself is dead, rather than a bad disc or other read issues I've looked at while researching this.

A friend suggested I check the fuses. Three of the inner fuses were missing (let's just say I have a brother with.... issues), so I replaced them today. No change. I'd still like to check for burned-out fuses just in case, but I can't tell which ones go to the navigation disc drive. I assume it's on the inner box, since it seems like an inside function, but I'm not sure. I can't read the shorthand on a lot of the fuses, so if someone could help lead me to which ones would control the Navigation disc drive, that would be awesome.

Assuming it's not a fuse issue, are there any other options I can explore rather than paying three to six hundred dollars for a new drive and trying to replace it myself?