You should post what chip voltage and frequency setting you are using, as well as the kind of firmware and the numbers of errors per time (i.e. hour or day) you get on the boards.
If the whole board gets XXXXX it can be a sign that your frequency is too high for that board and/or the chip voltage for that board is too low.
If the whole board disappears from the Web GUI it can be a sign that the PIC controller on the hash board needs to be reflashed.
HTH
flashing the pic controller its the same as flashing the intere miner ?
No, that is not the same.
If you have the option for repair, I would suggest to send the faulty hash board back. In the meantime you can still use the miner with the other 3 boards.
i have now flashed the circuit board with the 2019 firmaware but once again when i try to upload the firmware it tell me the 404 error message had it into another tap...
im using the mac but with parallel using windows 10 and edge explorer ...
why cant he find the file ??
should i try to use a normal pc ??
or is something else ??