I don't know if this will help but I just had a problem with my stereo. I have a 2011 Hyundai
Santa Fe and my stereo would not boot up. You may need to update your stereo. I have an
Advent stereo/navigation system. I read on a forum: 1.) Press and hold your finger to the
middle top portion of the screen of your Advent (if you have this stereo) as you start your
vehicle until you see it flash a solid green. You will then see a code prompt. Default coded
1630 and then press enter. You will then see a series of commands. Scroll to Update all.
Execute. This forces the Unit to reinstall everything from the memory card. It does take
some time. You will see multiple updates. (Do Not interrupt or shut off the Unit until
Done!!!) The unit will shut down when done and then restart when the installation is
complete. This might take a few minutes, Again do not interrupt!! I am no technician or
have any knowledge on how this unit works. This just worked on my unit and I am thankful
for Patrick Davis who I give credit for this information. He posted this back on 12/11/16 in
one of the forums