Beeps, but no indicator lights

Hello,

I have a broken hoverboard, that Im trying to fix.

At the moment when I push the button to turn on, I hear a tree-tone beep, and both battery and status led turn on green. Leds are on for a second and then they both turn off. But when I push the pads, the other blue leds in front of the board light up, indicating that I pushed on the pads. In other words, they react on pressure. But there is no movement on the motors and no indicator lights for battery and status. When I push the on/off button again, I hear a short beep indicating the board is turned off. And when I plug in the charger, I hear a two tone confirmation of charger present/ disconected.

Does anyone know what could cause the problem?

Thank You!