Good day,
I have a problem with one BFx2 Miner, one miner always lose the "red light" at one USB Port "14" and run very slow, is this a problem fro the USB port or to less power from the port?
The miner runs but without the "Vcore" light!???
Yes, that means the VCORE went out of regulation as far as the switching regulator is concerned, but it is still possible for the device to work.
Does the same device fail in the same way if you use a different USB port?
If you run BFGMiner you can also look at the device to see if both chips are working properly. Please try BFGMiner and then use the device options interface to see if both chips are reporting good hashes.