Call of Duty: Infinite Warfare Zombies mode requires players to turn on the power at Zombies in Spaceland before doing missions. Who would want to grope in the dark anyway? Here's a guide on where to find all generator boxes so you can turn the power on.
Call Of Duty: Infinite Warfare - Spawn Room Generator
First, head over to the spawn area and look for the first power generator. It should be the first to be powered up, otherwise, you cannot leave that place. The first generator is not really difficult to find though. Just when you arrived at the Zombies in Spaceland, go left and reach its end. You should be able to seem a room with a lightning bolt on the door's frame. Go inside and head rightwards and a flickering box should catch your attention now. Approach the box and press the action button. Now you can proceed to the other generators.
Call Of Duty: Infinite Warfare - Journey Into Space Generator
From the spawn area, make your way to the Journey Into Space section on the left. Once you are in, go right and climb upstairs where the Astrocade is located. Once in, go right. From where you are, the power generator should be on your right. Be careful because you are standing in front of a zombie spawn portal. Once the power in the arcade is on, you will now be free to play the games there. After playing, go back to the spawn area for instructions on the next box.
You will be asked to go back to the Journey Into Space section for the second generator. From the spawn area, go left and get inside the room. Take note that you will need enough money before getting inside. You should be seeing a red tower with a rocket ship. Go pass this and turn left and get inside an open door. Trace the underpass until you see the second power generator.
Call Of Duty: Infinite Warfare - Polar Peak Generator
At Polar Peak, there are a number of doors you have to pass through. Make sure you have plenty of cash with you. Enter the Polar Peak door that will lead you to the hallway. An open area is at the top. Go left and open the door. Go up and get inside the door leading to the roller coaster. From where you are standing, you will notice the fourth power generator.
Call Of Duty: Infinite Warfare - Kepler System Generator
Finally, finding the power generator in the Kepler System is easy. Upon entering, climb up and stay on the left. You should be seeing the restrooms. You need to play so you can enter it. Go left and notice the wall that says "power". Now that you have turned all the generators on, you can now find the Pack-A-Punch machine.