Hey, I was stupidly messing with my MD player in service mode and I messed something up. So when I want to go back into service mode, the code doesn't work. It plays fine, but I can't change the sound type, play mode, etc. It just shows useful and option. Does anyone have an idea? Thank you very much for any info or hlep. -boaf postscriptum: Sorry if this is in the wrong forum, I had no idea where to put it.