Acura9688 answered 6 months ago Just went through this with my 2008 RDX. Once you get this error where it says 'Downloading Software' and then, 'Please Check your Disc', it's not a good sign. It means that either the DVD Rom Navigation is failing, or you have a scratched disc. Most likely the laser is dirty (which can be cleaned with one of those disc / laser cleaners with the brushes on the CD), or you have a problem with the DVD Rom itself, which cannot easily be fixed without sending the unit to Alpine to get it repaired. In my case, I had a power interruption during a map update, so that put my system in an endless loop where it couldn't read the firmware or go back to the original firmware maps. 
The only solution I could find was to look for an auto wrecker that had an identical DVD Rom drive and then remove my old unit and replace it with the spare one. Trafaret zebra dlya pisjma a4 linii.
I searched high and low for a fix, but even the dealership couldnt reset the unit to read the original map DVD once it was in this mode, so I had to find a better solution. Either repair the DVD Rom by sending it to Alpine, or find a refurbished unit, or one from an auto-wrecker. Make sure that if you go the auto-wrecker route that you can get the Navi code for the DVD Rom unit, otherwise you won't be able to access the GPS system. If you have the original car's VIN and the serial number of the DVD Rom Navi unit then you can retrieve it online through Honda / Acura. Without the Navi code (the 4 digit anti-theft code used to activate the navigation system) it won't work.
Hope this information helps a bit. Hopefully your problem is just a dirty DVD lens that can be easily fixed with a CD/Disc drive cleaner.
P/N: BM513AO Version 3. 2004 Acura RL. 2004 - 2005 Acura TSX. 2004 - 2005 - 2006 Acura TL. 2003 - 2004 Acura MDX. 2010 Honda Motor Co. 2003 2004 Honda Accord Acura MDX Navigation Orange DVD U.S Map OEM Version 3.20A.