I unpluged the HDMI cable, and the ethernet worked! At least now I have access to the board. I will try to figure out how to make the display and gpu work.
It is important to know that video not showing up is often just a video configuration issue and the Jetson is otherwise actually running. The fan does not turn on unless the system is under load…normally there isn’t enough heat being generated for the fan to turn on. The red LEDs near the heatsink and near the PCIe slot indicate power is present…don’t let the red color fool you into thinking it is “bad” (the LEDs in fact confirm power is present). If you can ping the Jetson, or see a router log where a DHCP request was granted an IP address, then you will know it is just a video issue.