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Yamaha DX100

“I DO NOT have a power supply – I used some new “C” batteries. – When staring up – it indicates “CNG RAM BATTERY” – when I select different instrument / sounds it seems to work. – I plugged a pair of headphones (I do not have a amp any more) and it seems to work – Otherwise the rest is untested – not sure how all the functions / features work (it’s been a long time – I am the original owner). – in the original box (box has some dings / light punctures and the tape on the bottom was coming loose, so I put some packing tap on the seam)” Click here to search for synths on eBay