The only hydraulic pumps are on the main gearbox. After shutdown, the hydraulic accumulators do hold pressure for a while (a couple of days?), but only enough for a couple of seconds of moving the controls. Our pilots are conditioned to run the controls out at shutdown so that the accumulators are empty, so the mechanics can see the correct hydraulic fluid level in the reservoir, so we almost never have any pressure in the accumulators until the next startup. I could see where others might leave the accumulators charged between flights and thereby have enough pressure to move the controls for a quick check before starting the engines. This sim, however, seems to assume that when doing a cold start, the accumulators are empty until the hydraulic pumps can get pumping.