We think that your micro controller firmware has been partially erased. We have attached a program, a dll and a hex file. These are the tools you will need to reload your unit. Please be advised that the s/w attached is in-house software and not for general release and therefore must be reloaded on a PC and not a Mac. The procedure is as follows: --- Create a directory on the desktop of his computer Put the three program (download8816_5.exe),dll (Neve88.dll) and hex file (down_8816_5.hex) in that directory Plug the USB on a USB port of the PC Plug the USB into the 8816 unit. Switch on the unit Run download8816_5.exe by double clicking on its icon There is a small counter at the bottom of the screen. This counter will increase to 20 and the reloading will start. The reloading should take about 2 minutes and the counter will stop increasing during reloading. When the reloading is complete, the counter should go on increasing. As soon as the counter has started increasing again, close the program, unplug the USB, switch off the unit Switch the unit back Run Recall software and see if it is working. ----- Please advise AMS Neve Ltd of the results