This LED thing happens to me every time I loose power (no UPS) or if I power off the power supply it's self.
From a complete power off the red LED's come on and it take a couple of reboots before they go off. If I just power off the PC there is still some power left on, MB LED's and the USB's still power my phone and keep it charged and next power on the red LED's are off.
Go Figure...
Disregard the computer spec's that was my old one I am now on a Z390 I9 9900 32 gig mem, RTX 2080 watercooled GPU and CPU.