By default you shouldn’t need to turn the pumps on for hydraulics BLUE,GREEN,YELLOW. No lights means “Auto”
If any light is illuminated on the upper panel something is wrong. Not including the green feed lines, but everything else. Upper panel needs to be dark.
I’ve done this myself because it says “on” even tho I knew better.
Dark panel = good to go
Imagine there’s a reason to want to turn the pump on, maybe for emergencies but unsure of a reason. I’m sure someone knows.