RZBox 16GB+512 SSD - shutdown

Hi i have a chuwi rxbox. Today while I was using the pc it suddenly shut down. The power supply has the green LED on, but as I connect it to the computer, the LED goes off and I can’t turn it on? solutions? Do you know what could be the problem? I think it’s a motherboard or processor problem. In this case, is it possible to proceed with a replacement or a repair?

I bought RZBox about 2 years ago, directly from your store. The serial number is: ZRZBOXIY1H220900004.