No light on 1 of the ASIC boards. Tried swapping cables and always this board that fails.
Suggest you try the new firmware: http://www.innosilicon.com/html/downA4/index.html
A4+ and A5 share a update firmware. If the firmware build date is before 2017.11.24, you must upgrade through TF card. If the firmware build date is 2017.11.24 or later, you can upgrade on the webpage of the miner.