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.
Pop Ryan, February 2020


done
these may give some clues:

https://thestairlift.com/failsafeoverspeedgovernor.html

https://a1stairliftspares.co.uk/product/acorn-osg/

https://stairliftrepair.com/acorn-stair-lift-troubleshooting/ - about halfway down the page

aerhystrh, February 2020
link Click here to see other fixes for Minivator 1000.