Since you have a Tiffin. I would not worry about it unless it happens more frequently. Tiffins have an extra Ignition controlled solenoid that powers various cockpit 12 volt items and controls. Including the Slede/jack control power. So, next time it happens, try to EXTEND the jacks, or see if the Dash AC and electric mirrors operate. If they also don't operate, then you have that Ignition solenoid that is worn and failing. But, as you found out, you cycled the Ignition and the slides operated. This happened because WHEN this happens, you can cycle the Ignition key a few times and this will cause that solenoid to close and give power. IF the Dash AC fan is not blowing when this happens, I cycle the Ignition until the Dash Fan starts running and then I know the solenoid has closed. This is a common problem on all model Tiffins going back to 1995 when they started slides and when that solenoid eventually wears out. Doug