I am not sure what is happening with my 450g, i was press the bios reset button when it’s being turned on, and i plug out the power then reconnect, by the time i turn on again, the green light and port led indicator kept flashing infinity, on my serial it’s kept repeating at this process :
This problems has been fixed, to those who needs, the cause either a insufficient adapter power and try to plug off the power for couple days, my mikrotik booting normally afterward.
So what changed after those many years? Did original power supply die? If not, it should have kept working. Did it perhaps have higher voltage? I saw that, RB stopped working with I think 24V, but worked fine with 12V. And when I looked inside, capacitors weren’t in great shape at all.