Received my new shorter M.2 extender board yesterday with no instructions. It comes with 2 ribbon cables, which are longer for folks who intend to mount the board on top of the SBC (improving access to the microSD slot). I noticed that the contacts on the ends of the cable are now on opposite sides.
But, when I examined the board’s M.2 connector, I could see that the contacts grip the ribbon cable on both sides. In other words, it doesn’t matter which side of the ribbon cable has exposed contacts, from an electronics perspective.
So, I used my original shorter cable because I am customizing an aluminum hobby case and the longer cable doesn’t fit and would make the microSD slot inaccessible (too far inside the case to reach). I left the board’s orientation the same as before. In other words, the only difference is that the M.2 connector is on the opposite side of the board, but pin # 1 would be the same… so I thought.
When Radxa remounted the M.2 connector, they also reversed the pinout order!
Now, I have a dead Rock Pi 4B. Most likely, the $270 Samsung 1TB NVMe is dead too. All parts included, I’m out $500 now.
Perhaps @jack or @luffy… someone should inform Radxa that they need to provide their customers with some installation instructions, which includes a fair warning that the pinouts on the new M.2 extender board have been reversed. That would have avoided this from happening.
Doubt if you folks will be hearing any more from me in the future. Thanks to all of you who have been so helpful. Best of luck in your endeavors.