Roland JX-3P Patches 1-8 not working

Hi there - I have a JX-3P that I purchased used about a year ago and am finally getting around to attempt to figure out the issue. It looks like just about everything works on the synth, except patches 1-8. I know the LEDs are working, as hitting write lights them up. I’m not very knowledgeable on the insides of a synth but can solder and do the 101s of synth repair. Thanks for any and all input on how to fix this.