Apple TV 4K's issue. The indicator light keeps flashing, but the image has no response and it is black.

I bought the apple tv 4K in Hong Kong before, but now it doesn’t work. The indicator light keeps flashing, but the image has no response and it is black. It is also not possible to insert the USB-C data cable to update the software on the Apple TV 4K machine, and it still does not work normally. In mainland China, the apple store cannot do any repairs. Now it is the Covid-19, and I cannot go to Hong Kong for replacement or repair. that's terrible Is there any way to fix it?