All 5 front leds + the one on the back are constanly lit, but there are only three network cables connected. I cannot ping or contact it in any way. Have tried to leave it without power for some time, but doesn’t seem to come back up again when I insert the power cable.
what model is the board and how old are they? I have many RB411 and RB433ah that are showing the same thing. I think in my case the caps are bad. are yours green and 6.3 volts and 560 uf. if so that may be your problem too.