If you're having power on issues, I would make sure you are using a standalone power brick. I've used a Surface Pro for work and I've found that sometimes when connected to the docking station, it wouldn't power on. When connected to a standalone power brick it usually would. For a standalone power brick, I've used both the one that came with the Surface and also a 65W USB-C adapter with a USB-C to Surface per cable.
If you're having power on issues, I would make sure you are using a standalone power brick. I've used a Surface Pro for work and I've found that sometimes when connected to the docking station, it wouldn't power on. When connected to a standalone power brick it usually would. For a standalone power brick, I've used both the one that came with the Surface and also a 65W USB-C adapter with a USB-C to Surface per cable.