KORG microsampler key repair

I want to correct some internal noises on my KORG MS1 (microsampler)

These things were discontinued a while back and I can’t find a service manual anywhere. The problems arise from the keybed and the LED display. Has anyone taken one of these apart? I consider myself mechanically inclined, but these MS1s seem pretty quirky - is there anything I should consider if I want access to the keybed and LED? How accessible are these areas once the case has been removed?

Thanks a lot