Today, my LattePanda Sigma won't power on.

Today, my LattePanda Sigma won't power on. I've been using it as a download PC connected to a UPS for about 2 years.
This morning, I found that the device couldn't power on. Even when using the original power adapter or supplying power via USB Type-C, it still shows 0W.
Is there still a chance to get it repaired?