Hydroboost and break power steering problem

Since both the Brakes and the steering use the same pump. when the engine is running, clearly that is the common item.. Oh, and a few hoses. Sometimes hoses do strange things.. Like turn into check valves.

If you have "Spitter" things on the bottom Underneath that ism, of your compartments.. That's the kind of check valve a hose can become. Rare, but happens happened to me on a car.