X870A POST failing on boot light

[Klepp8]

Hello,

I bought a RoG Strix X870-A Gaming WiFi mobo and have not been able to complete its POST. I purchased 4x16GB Corsair RAM (CMH32GX5M2B6000C30W), Ryzen 7 9800X3D, and Arctic Liquid Freezer III 240 to pair with the motherboard. The rest of my components are from a previous build (that was still working when disassembled). Those components are RoG Strix 1080 TI, Samsung 990 pro M.2 2TB, Samsung 850 evo 500 GB, western digital HDD 1TB (unplugged and unused currently), EVGA Supernova 750w gold PSU.

Originally, I plugged everything in and tried to boot. Passed the orange DRAM, passed the red CPU, passed the white VGA, stuck on yellow boot light. Light stays solid no matter how long I leave PC on.

The first steps I took were to remove the RAM sticks and leave only 1 in the A2 slot. I have cycled the 4 of them through the A2 slot. I then used a flash drive to update my BIOS to version 1504 using BIOS flashback. I then reset my CMOS using the button on the motherboard rear panel. Realized at this point, I couldn’t have all 3 storage drives plugged in to the motherboard for initial boot. I can’t access M.2 slot 1 (where my M.2 was) with the water cooler I am running. Instead of removing and reseating the water cooler, I tried to access my BIOS on start up during the POST to tell the motherboard which drive has my OS installed on it, but I am unable to access the BIOS. Unable to access BIOS, I removed the M.2, reseated the CPU cooler and the only storage drive attached to my motherboard is my 850 Evo that has windows OS (windows 10, previous system wouldn’t support windows 11). Rebooted system and still fails POST. Reset CMOS again. Replaced the old SATA cable attached to my SSD and used one of the new SATA cables that came with the X870A. Every boot I ran passed the DRAM, CPU, and VGA POST and got stuck on the Boot light. I have tried to access the BIOS during POST at least 10 times, using a mixture of HDMI plugged in to the GPU or motherboard and haven’t been able to access it.

I am currently out of ideas on next steps to fixing my boot issue.

-Klepp8

[nemen]

have you tried using 2 sticks of ram? using slots 2 and 4 only

[RomanDoskoch]

@Klepp8 wrote:

Originally, I plugged everything in and tried to boot. Passed the orange DRAM, passed the red CPU, passed the white VGA, stuck on yellow boot light. Light stays solid no matter how long I leave PC on.

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I had similar issue with X870E-E and 9950X.

Based on MB manual the yellow LED light is for RAM (English version, Chapter 19, page 30).

Yellow LED most likely indicates memory training process which can take some time - for me it was about 10 minutes on the very first successful PC boot.

I tried with 2 memory sticks (A2, B2 slots), no discrete GPU. I didn't have any OS because my 2 M.2 SSDs were completely new (and empty).

I would try to boot with only as few devices as possible - CPU, AIO, RAM (disconnect your 1080 TI, use your CPU integrated graphics so use HDMI or DP on MB rear IO panel), wait up to 15-20 minutes until yellow light goes off. If everything is OK then on the very first boot you'll be prompted to enter BIOS setup by pressing F1 (or if no prompt just keep pressing Del or F2 button after the boot).

It worked for me so maybe it will help.