Troubleshooting - smart piano The ONE Keyboard Pro Essential User Manual

The one_TON_manual_G01_170606.pdf 13 17/6/6 17:25
Trouble shooting
Problem
A noise is heard when tuning on or off the keyboard
Speakers do no work when playing the keyboard
C
M
Y
CM
MY
CY
CMY
K
11
Possible cause and solution
A slight humming noise is normal when start or turn off the
keyboard.