Non-working Minivator 1000?

My minivator 1000 was just reinstalled in my new condo. After fixing a few problems that were quite obvious and replacing the batteries, power up shows the - in the diag window but it doesn't move. looking at the pcb I see the LED is flashing red. It mentions the OSB in the Fault Analysis chart as being a possible culprit. It also say "reset the OSB' but doesn't say how. Where or hoe do I reset it.