Ceiling Light 650 (YLXD02YL) stop working

Hi together,
after a software update it was for me no longer possible to save the configuration oft the main and the ambient light of my lamp.
For the first time i´m not giving a rip of it, but a few days later the whole lamp stop working.

Now i can only hear a high-pitched buzzing sound from the device and i think there are problems with the switching regulator on the board.

Now what can i do?
I bought the device on aliexpress from “Yeelight-Online Store”.
From your experience you maybe know the exactly problem on the board or is it possible to get a new board.

Thanks all for your help