I cannot get anything to show up on my monitor.

###Troubleshooting Help:

CPU: Ryzen 5 1600 CPU Cooler: Stock Ryzen Wraith GPU: MSI GTX 1070 8G Case: NZXT S340 Motherboard: MSI B350 Tomahawk Samsung 250 GB Evo SSD Power: Seasonic G Series 550W

Describe your problem. List any error messages and symptoms. Be descriptive.

I just finished my first PC build. I'm pretty sure I have everything connected correctly. The lights on the components are on and the fans are all running. Nothing shows up on the monitor when I turn the computer on. I've tried plugging an HDMI in the motherboard and GPU. No difference. I hope I didn't break anything. Thanks for the help.

List anything you've done in attempt to diagnose or fix the problem.

I've double checked all the connections. I don't know what else to do.