Like I mentioned...if the power cycle by removing the power cable don't work and it's an older unit...ripping it apart to get the disks might be your only hope. The deck won't survive the operation and there's a good chance your disk might be pooched as well. I don't use the CD in mine for that reason as dust and dirt getting inside it mess up the CD. It's either External audio device or a burned copy of the disk so I'm not out a good CD if it happens or gets broken into.
l We're here for a good time. Not a long time. So have a good time the sun can't shine every day.