Yamaha PSR-S670 - Manual (Page 3)

1) The power supply was cut off or the USB memory was removed during operation.
A complete reinstall is necessary. Perform the operation again from the beginning.
2) The installation cannot be executed and an error message appears in the display.
Check the following:
✓ Is the USB memory inserted correctly?
✓ Is the USB connector free from dust or dirt?
✓ Is all required data located in the root directory of USB memory?
✓ Is the USB memory or the upgrade data itself damaged in some way?
✓ Does the data correspond to the instrument?
Try installing it again by using another USB memory.
Troubleshooting