Perhaps you lost your board or clicked it on an unpaid account and the board 'popped' into a paid mode and became useless to you.
Not a problem. Below are locations for either side to get a new board.
Omni:
In Omni Trade, coming from the ICC Whompah, go straight west under three sets of statues, at the fourth set on the right are mission terminals and a 'basic startup' booth. The boards and a few other items are there.
At Omni Entertainment, coming out of the Rome Whompah, take a slight left (southwest) into a street. A little way into the street, on the right side, is a portal to "Htech" with a white Yalmaha up and between the two doors. Inside each one is a booth for OT computers. Only the unpaid board is here.
Clan:
At the Whompahs in Old Athen, just north of the Tir exit, are mission terminals with a 'basic equipment' booth in between them. This booth has paid and unpaid boards and a few other items.
No doubt there are other locations. these worked well for me.