RB750 loses configuration on power cycle

I have two Routerboard 750gl boards in service and I am have a problem where one of them loses all settings when it is power cycled. I have to reset the unit in order to get the default settings back on but when it is rebooted or power cycled it loses all it’s settings again. I have tried to Netinstall software which works, but I have the same no settings on restart problem with it after the update.

I would appreciate any ideas or advice here. Is the board toast or am I doing something wrong? Do you have to specify a startup script or something? It’s like the board reboots but has no configuration so it just hangs…

One more thing that might provide a clue: When I hold the reset button for 3 sec. on power up the config is there! Why??? :frowning: