The easiest way to turn on the power just requires you to have enough to get through a number of barricades. You're going to want to move from the outer tee area to the bowels of this complex. To do this, you will have to earn money by killing zombies and then use that money to open the doors and clear the blockages in your path. The video guide below will show you the exact path to turn on the device.
How to Activate Power Black Ops Cold War - Video Guide
Requirements for powering up
There are no actual conditions or certain levels to reach before you can power up in Die Maschine. You just need enough money to clear the barricades and open the doors. This method of activating power in Die Maschine Zombies in Black Ops Cold War requires you to unlock multiple doors and clear multiple barricades with money. There are three locked doors and four barricades that you must clean before accessing the power button. In total, you will need $ 8250 in cash.
First door locked - $ 500
From the start of the level, you'll want to head left towards the pink door with the bunny on it. Open it for $ 500 to access the facility.
Barricade Explosive - $ 750 - Living room
Hang right once you enter this building and you will find yourself in the 'living room'. You will see a stairwell to the right with a large red X and a purple arrow pointing to it. Blow that up by spending $ 750 and move on to the next area.
Barricade explosive - $ 1000
Through the door around the corner through "The Mezzanine" and the rubble and all the way to the opposite side of this area called "The Penthouse" you will find yet another barricade that needs to be crossed. There will also be a big red X on it. Pay the $ 1000 and go down to the area outside the building
Barricade explosive - $ 1250
Once outside you will be at the crash site and at this point it should be immediately clear where you need to go. Head to the red X and the purple arrow. Blow up this barricade and you will take one more step towards access to the facility. Once this barricade is cleared, you will come to a set of bunker doors that will automatically open. Go inside then look for the barricade below:
Barricade explosive - $ 1500
The barricades are starting to get expensive, but now you are approaching power. This barricade will be on the left side as you approach after entering the bunker doors. Blow this one up and you will just have two doors to open and you will be in power. As you make your way to this next area it gets a little dark so make sure to look for the large purple glowing arrow to find your next target, which is a locked door in the "Medical Bay".
Locked door - $ 1500
Once you get to this locked door, you are at a door of power. Open it for $ 1 and you're almost done. Enter the Particle Accelerator room and you will find that the power button is in sight.
Locked door $ 1750
The power button is in the room in the image above. It has a door on each side, which can be opened for $ 1750. Once you open the door, you will have access to the power button which can be pressed to activate the toll-free power supply.
Power button $ 0
Enter that last door and you will find the power button on the console which is next to the window. From there, there are plenty of options as to what you want to do first. Upgrading your weapons and perks should be a top priority now that you're powered up.