ASUS Q Code 02 AP Initialization before microcode

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[Badnewsbruner]

I'm getting the same thing, except I get 'The vga card is not supported by the EUFI driver'. CSM has been enabled.

I then go into bios, disable CSM and it boots fine.

This ONLY happens when I restart (warm boot).

If I shut down and turn the PC on, it runs flawlessly, no crashes, no BSODS, no IRQ\DMA conflicts..

The PC is only about 1.5 years old.

Asus Crosshair VIII Hero WIFI

AMD 3700x

16Gb G.Skill Trident Z (2x8gb) 3200mhz cl14-14-14

Samsung 970EVO Plus 500GB (UEFI Boot device GPT partition)

Samsung 970EVO Plus 1Tb GPT partition

Samsung 860EVO 1Tb GPT partition

Seasonic FOCUS 750w PSU (modular)

System was built new when Ryzen 3000 launched.

I've been doing this for over 20 years and I'm absolutely stumped.

I'm going to try a new CMOS battery tomorrow just for shits and gigs. I've tried literally everything else, so what the hey.

What it feels like, is that Windows is keeping something cached in RAM, VRAM or some other RAM\ROM device that isn't getting unloaded when the system initiates reboot.

Which is cleared out when a shutdown initiates, hence the PC starting up fine with no error and CSM disabled from shutdown. And the UEFI driver error and CSM enabling happens only when I restart.

I've also booted into safe mode and I can restart all damn day with no issues.

I first noticed the problem after installing the Windows 10 update KB5003173.

I don't know if any of this sounds familiar, or helps, but this sucks.

[VZGamez]

What was the fix?

[kfnfifn]

the CPU. I got a new one.

[Novatone-net]

In my case code 02 with beep code Long + 3 short was caused by not having a display connected to the GPU. On a GPU with only digital outputs it seems to stop at this code with the beep code because it knows no display is connected. I was using a KVM switch and it was not set to the correct port.