Otis 211 is popping up STLD fault whenever unit is powered back up after power is off. Never attempts to make a run before it pops up. Does it no matter where the car is in the hoistway. 2 stop hydro. Fuses are good. Magnets are glued down to proper positions. Replaced the lithium battery on the main board. Slowdown and limit switches ohm out fine. Will do it even if it’s on inspection in the middle of the hoistway. No valve issue as problem only occurs upon powering unit back up. Am able to clear the fault and it will run fine after, until the next time power goes out. Any insight is appreciated. Leaning towards replacing one of either the main board or the selector board.