Hi Deane,
I am sorry that the touchscreen of your Ketron SD90 module did not work. I received mine on Augest 14, 2018 and it has been working as expected. I added a Ketron FS-13 footswitch for the convenience of style progress control and vocal harmony on/off. I am in the process of setting up a Korg Kronos 2 88 keyboard with the intention of eventually pairing it with the SD90, pending the arrival of the Jaspers 4S-150S A-Frame keyboard stand.
AJ is great help in pre and post sale support. I once received his Whatsapp reply message at 2:33am Central time. I have full confidence that AJ will be able to take care of the touchscreen issue for you.
Thanks,
Paul
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Yamaha Genos, Ketron SD90, Korg Kronos 2 88, Korg PA1000, Casio Privia PX560