Hi,
I am resending this. I am not sure if my responses are being moderated. Apologies if it seems duplicated.
"Can you play piano on a floppy disk normally?"
Yes. I did that without a problem.
"Can you measure the keyboard(maintenance mode→Keyboard measurement) but can not record your performance?"
Yes, this is the problem
"Can you enter the test mode and check the key and hammer sensor?"
Yes. I was able to enter test mode and see the screens for key and hammer check. However, I am not sure on how to activate the sensor.
Bill