reTerminal DM - Dual Ethernet PCIe Port Expansion killed reTerminal

[ahsrabrifat]

@openiotgroup

Been using a reTerminal DM for about a year now and it has been amazing. I now need to add dual ethernet ports to the device. When I added this expansion board and repowered the device it no longer is responsive. The act/power light are on solid. The act no longer flickers.

I tested voltages on the various headers and everything is within spec.

When I try connecting using the rpiboot nothing happens. I can try replacing the cm4? but the root cause seems to be the pcie add on board?

Has anyone else experienced this? Wiring issue with the harnesses?

Any help appreciated.

Disconnect the PCIe board, re-power the reTerminal DM.
If the ACT LED resumes blinking and HDMI/UART becomes responsive, it confirms the PCIe board is the cause.