You need to provide a bit more information. What usb hub is it running on and have you tested the hub seperately? What voltage is the core? What freq was it running at? Has windows done any updates and changed the driver back again so may need to do zadig again? Any pictures of the back of the pcb to see any physical damage?
[/quote]

if have a couple but 1 doesn't work anymore! all same settings!

no psysical damage, that's i ask how can you see if it is damaged or not.

the windows does recognize the miner. but the cg miner says no device detected. so i don't get it.

with these crypto miner, some strange thing happens.

maybe the miner has mined it's max? i'm mining the same coin for long while? i don't know.