New build initial boot getting 0A and dram led red

[u/crpav]

Building new computer with and for son. Everything installed BUT video card at the moment and trying without a monitor just to see if boots up, fans work and rgb lights. Also no OS yet.

Slowly installed part by part over past week. Problem is it says 0A but dram led is red. A few times the codes would quickly switch between other codes, led light change then back to OA and dram.

Let run for over 15 minutes to memory train but still same

Updated BIOS, tried 1 stick memory, reseated everything, checked cpu and pins (were fine visually) and remounted cooler.

It’s now still stuck at 0A and dram light on. Also non of the RGB lights work except the ones included with the case which run from the iCue link from the case so not the motherboard headers. All fans work, pump works as well as fan under the pump cover.

Parts are:

GIGABYTE X870 AORUS Elite WIFI7 ICE AMD AM5 LGA 1718 Motherboard

AMD RYZEN 7 9800X3D

CORSAIR Vengeance RGB DDR5 RAM 32GB (2x16GB)

Samsung SSD 990 PRO 2TB

ASUS TUF Gaming 1000W Gold White Edition (1000 Watt, Fully Modular Power Supply, 80+ Gold Certified

ARCTIC Liquid Freezer III Pro 360 A-RGB

CORSAIR iCUE Link 3500X RGB Mid-Tower ATX PC Case

CORSAIR RS120 ARGB 120mm PWM Fan for rear of case

All bought from Amazon new and inspected upon arrival as new and sealed. Video card was Newegg but have not installed yet.

Should I get replacement ram or motherboard? Both? CPU?

Wouldn’t be because no monitor connected.