Hi Mr Kyler,
Here's my Log.txt file newly generated after deleting the old one, starting up 737CP with Level 2 check failure and then shutting down the sim.
As mentioned above, the interior, exterior and environment sounds are muted and even after pulling the slides to increase the volume, the sounds remain muted and the corresponding sliders are back again to full left.
Thanks for all your hard work and efforts. I'm sure this will get sorted out...
Log.txt