What does the etched (vs non-etched) RJ45 jack indicate?
I have 3 of the 2GB versions; only one works in the remote location powered by PoE. The two that do NOT work - the newest and oldest of the 3 - have an etched RJ45 jack.
The one that does work has no etching.
What do I ask for, when ordering, to receive the non-etched version?
I move the SD Card and the POE HAT to each Pi in-turn for testing (eg all is identical except the Raspberry Pi itself).
Note: for the good Pi, once the ethernet cable is plugged in, within 2 seconds I see proper activity lights on the RJ45 jack. for the 2 'bad' Pis, I plug in the ethernet cable, and approx. 15 sec later both lights on the RJ45 jack flash on/off approx once per second. and the PI is not pingable (and doesn't grab an address from DHCP)
Note2: all 3 Pis work fine when powered by the USBC port (with and without the POE hat installed)
so, what does the etching mean?
or, any suggestions how to get the 2 non-working Pis to function.