via this auction
"This truly one-of-a-kind microKORG is serial #101519. This auction contains the following refinements & alterations:
All 8 'Program' lights & 'Tempo' light have been changed to diffused BLUE LED's.
The Arpeggiator LED (under the Arpeggiator button) has been changed to a HOT PINK ONE (though it almost looks purple, through the lens).
The 'Write' light has been changed to diffused WHITE LED. 
The 'Modified' light has been converted to diffused HOT PINK LED. Entire enclosure is repainted (except the back panel) with dark brown, non-reflective enamel paint (very nice durable multi-coat paint job). This required removing all the electronics during painting, but it was worth the work.
Program Select knob painted flat black enamel to compliment dark enclosure (very nice multi-coat durable paint job).
Black Walnut hand-sanded 3/4" end plates with multi-coat polyurethane finish.
The stock internal 3.3V main supply circuit for the DSP, CPU, RAM, & Analog circuitry has been professionally replaced with a much more robust switching regulator module to insure years of problem free service including overload, reverse polarity, & over voltage protection.
Rigorously tested for months (I have been working on and using this synthesizer for about 5 months).
Many, many custom sounds loaded (easily changeable with included MIDI adapter & Korg Patch Editor software.
All electronic modification work was performed professionally, using an ESD (Electrostatic Discharge) safe workstation, and all replacement LED's are American-Made parts! This synthesizer has been meticulously cleaned & carefully tested."
