Hi I just bought an Acura RL 2005. The navigation is not working (I bought fully realizing this) and I would like to get the necessary parts to get it fixed. I've read online people have mentioned having a blank screen but the backlight is still present. In my case the screen doesn't even light up at all. The radio and cd player work and display on the upper display works as well. With the display being completely black is this likely an issue with the display or the dvd unit in the trunk? The dvd unit in the trunk will eject the dvd and reload it of course with no display I don't know if its functioning. According to the dealer it was going to be a $2000 replacement. I've seen used OEM screen and dvd parts on ebay and was considering getting one of those and replacing it that way. I just dont' know if I need a replacement screen or dvd unit. Thanks for your help!

 

My son bought an 05 in the same condition and I advised him to buy it because it was so cheap with no display and therefore As-Is. I removed the DVD from the trunk and sent it to Alpine in So Cal for a fixed fee refurbish of approx. $200. It came back in a week and everything was perfect.
It's easy to remove, send it with the DVD ejected but included. You could try the EBay approach but I recommend sending it to Alpine, it's cheap and warranted.

 

There are a number of threads on this issue. I believe a fuse may be one of the potential issues.