Light won't change colour to white YLXD04YL

It happened last week one of my celing lamp won’t change it’s colour to any other than yellowish. If I force it to change to 6000k it turns itself off ( low level of light if any) . Does anyone know how to fix it?

Hello, it may be that the cold color temperature line of the lamps and lanterns is not in good contact, or there is something wrong with the cold color temperature lamp bead

So I will need to disassemble it?

today have same issue white color won’t work. how to fix it ?

https://www.youtube.com/shorts/S8hRI670YP8

PLEASE HELP STAFF YEELIGHT .

Hello, it is recommended to replace this product after the expiration date. It is not recommended to disassemble it by yourself

Hello, it is recommended to replace this product after the expiration date. It is not recommended to disassemble it by yourself