RN516 - Boot Loop after power outage

Try booting without drives first.  If that works, it's unlikely a USB recovery id going to help.

But I did see a similar symptom that was cured by a USB recovery.  The 516's with the latest BIOS (like the one I saw it on) don't need you to play tag with the button to boot from USB, so it was easy for me.  If yours is older, then I think it's just a matter of multiple tries till you somehow get it right.  Netgear obviously recognized there was a problem with that USB recovery scheme and fixed it in the later BIOS, but loading a new BIOS was not made available because, as I understand it, what version you came from made a difference as to the process needed.

Thanks for the reply,

Yep, i have tried pulling the drives but i still get the same result, the LCD displays "Netgear storage welcome" then the touch pad lights up for 2-3 seconds, then it repeats, and the fan is at full speedthe whole time.

I have a usb stick with an LED, and it flashes once quickly when first inserted but then nothing there after, not even on the next loop, only when first inserted.

I have seen a few people have had a similar experience, any ideas on what the cause may be? i have tested the power supply and all output voltages look to be within tolerance, not that that rules out an issue on current draw.

Would a fault with the RAM cause this kind of issue? or is it likely something else?