@abocaman similar situation here, but intead of 00:00:00:00, my PLC shows AMC and password different than the one on product label, so it also shows "unknow" on new utility software. This happened...

@fvicente same thing here: my PLC shows another mac and password on old utility, and apperas as unknown on the new utility. first, powerline light (middle one) wasn't lightning, so I did a firmware...