this is the 3rd time in the past month I've heard of cd reading trouble from doujindance DUO-r consoles......Honestly I'd stay away from his consoles in general. He cakes all his wiring with glue of some sort making it very difficult to fix some things if they ever go bad in the future.
Mine had an issue with CD game music and audio drops after about a year. Adjusting one of the internal pots solved it. But I don't remember noticing all the wiring being 'caked'. I'll have to have another look, cause I wonder if he just started doing this?
At the time of the above I order a back-up HOP-M3 laser just in case the pot adjustment didn't work. It never hurts to have a spare on hand