Hi all
During operation Yamaha PSR-540 hangs. Why? Such can at whom? Help by advice
Thank you, Sergy

If you have a floppy disk in the disk drive it could be that the drive is malfunctioning. Try powering down and playing the keyboard wothout a floppy in the drive and see if it still hangs.

Thank you for the answer.
It hangs without the working disc drive. Can it be from behind the faulty adapter of voltage?

Best regards,
Sergy.

If You suspect the power supply-try running it with batteries. If it still hangs on battery power it's going to need to be serviced by Yamaha. One last thing-make sure that you do not have a sustain pedal connected. If you have a sustain pedal with the wrong polarity it will work opposite the way it should.

The pedal is not present. Hangs simplly during game. It can the adapter or differences in an electrical network. At us in Russia all can be.
Good luck, Sergy