There are two reason of automatic shutdown:  

1.    “Auto Power Off” function

The ONE keyboard/piano is equipped with the “auto power off” feature. If there are no buttons or keys operated within 30 minutes, the keyboard/piano will be shut off. 

You can set the “auto power off” function in the APP. Open “The ONE Smart Piano” app, go to “Music Sheet”>”Settings” >” auto shutdown”.

2. Piano accessories are damaged

There are buttons or keys operated before the shutdown, please check the plug is powered and the power adapter is work well.

If the power supply is good, still not power on, it should be need to replace the piano accessories.