We often discuss the choice of a beginner oscilloscope, a digital or analogue oscilloscope.
Speaking of analog oscilloscope, we mean a modern version transistorized and in good working order.
Here you have bought a brontosaurus vacuum tube technology oscilloscope and in a not working condition ...
Do not you think you exaggerated in the absurd?
This oscilloscope can at most appear in the showcase of a museum and is no longer of any use at the present days.
In addition, tube technology is too dangerous for a beginner because there are high and lethal supply voltages.
Put this device in the dumpster or resell it and buy a modern oscilloscope that is in good working order.
Unless you are a collector, do not waste your time with such an antiquity.
Anyway, if you are a collector, here some informations about restauration of this kind of oscilloscope: