Is my motherboard faulty?

[Avorik68]

Hi,
every time I unplug my PC from wall and then power it back on I get into this weird boot loop: CPU led turns on for 2 seconds then DRAM led blink once and then CPU led turns on again, and so on in a loop. When this happens the only way to boot it again is to press POWER and RESET button for 20 seconds then it boots normaly again. 
I tried BIOS update, clearing CMOS, restoring defaults but nothing seems to fix the problem. 
Where could the problem be, what should I do?

I was thinking that maybe the CMOS battery is bad so it messes with the BIOS data by not having enough power to sustain the data in CMOS, but I don't know how to check?

 

CPU: Ryzen 7 2700

MBO: GIGABYTE X470 AORUS ULTRA GAMING(rev.1.0)

RAM: 2x8GB 2400 MHz (Crucial - CT8G4DFS824A.C8FDD)

PSU: 600W chipes psu I could find at the moment (planing on upgrade in the near future..)

 

Update:

The battery is okay because when I do save bios boot all my settings stay.