This is likely a hardware failure and would need to be repaired. It would not hurt to reflash the firmware, just in case, but I would not really expect that to work. If you would like to try this, do not use the firmware sourced from the website if you are running V50 firmware. Instead, contact us via email, and we will send you a modified firmware to try (the firmware is the same, it is the installation process that needs to be changed).
If you are running something other than V50, you can use the update from the website.
http://www.paulcbuff.com/fw-cc.php