X870 Steel Legend Idle/Sleep Freezing

I also found the Reddit page where all the reports concerning AMD 9000 series have been bundled. Not sure why i hadn't found that earlier.
https://www.reddit.com/r/ASRock/comments/1q3ff0t/9000series_cpu_failures_deaths_megathread_4/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

Sorry to hear it jonwtr, good luck with the replacement, let us know how it goes.

jorgensen wrote: With driver 591.59 wakeup now works

Nice, more often than not the issue is caused by drivers or windows updates. It's
one of the reasons we so often see a major windows update followed up within hours/days
by a chipset/all in one driver update from AMD/Intel.

With driver 591.59 wakeup now works

Looks like my problems are hardware related, my system has gotten progressively worse.
At first when I did get it to boot into bios it was in bios for a few seconds before it just froze. keyboard and mouse input stopped working, and the clock stood still.
Now I'm at a point where it won't even boot into BIOS at all anymore, the loading screen never shows up, not even bare metal.

I've also succeeded in updating to the latest bios rom released on the 22nd via the flashback method. But the results stay the same.

Here's the summary I've made that I'll send to ASRock.

Subject: Urgent Help: X870 Steel Legend + 9950X ??Progressive Failure to "Green LED / No Video" State

System Specifications:

[] Motherboard: ASRock X870 Steel Legend WiFi [] CPU: AMD Ryzen 9 9950X [] RAM: Corsair Vengeance RGB 96GB (2x 48GB) DDR5-6000 CL36 (Model: CMH96GX5M2E6000Z36) [] GPU: NVIDIA GeForce RTX 5080 (Currently removed for troubleshooting) Storage: Samsung 9100 PRO NVMe (Currently removed for troubleshooting)

Description of Problem: I am experiencing a total system failure that has degraded progressively over the last week. The system has gone from perfectly stable under heavy load to a state where it now POSTs to a Green LED but outputs no video and has no USB functionality.

---

1. Timeline of Failure (Progressive Degradation) This system was not dead on arrival.

[] Phase 1 (Perfect Operation): For the first 2-4 days, the system was fully stable. I used a multi-monitor setup and ran heavy workloads (Adobe Premiere, Blender rendering, and Gaming) to benchmark the Ryzen 9950X against my old PC. It handled high stress on both CPU and GPU perfectly. Note: I used default BIOS settings + EXPO 6000. No manual overclocking was ever attempted. [] Phase 2 (Idle Instability): The first symptom was a failure to wake from Sleep/Hibernate states, requiring a hard reset. [] Phase 3 (Load Instability): The system began freezing during active workloads and eventually froze during the Windows boot animation. [] Phase 4 (Total Failure - Current State): The system now POSTs to a Green Boot LED but is completely unresponsive (Black Screen).

2. Detailed Symptoms (Current "Zombie" State)

[] The Boot Sequence: CPU Red LED (Solid) -> DRAM Yellow LED (Blinking) -> BOOT Green LED (Solid). [] The Failure: Despite the "Green Boot LED" indicating a successful POST, there is NO Video Signal (via dGPU or iGPU) and NO USB power to peripherals. The system logic believes it has booted, but the I/O interfaces are electrically dead.

3. Troubleshooting Steps Taken (Ruling out other causes) I have performed extensive isolation testing to confirm the issue is not the peripherals:

A. Bare Metal Isolation

[] Removed the Dedicated GPU (RTX 5080), all Storage drives, and all USB devices. [] Connected Monitor directly to Motherboard HDMI. Result: Same behavior (Green LED, No Video).

B. RAM Permutations

[] Tested with single RAM stick in Slot A2, then Slot B2. [] Result: Identical failure in all configurations.

C. BIOS Flashback (Critical Test)

[] I successfully performed a BIOS Flashback to the latest version 4.03 (AGESA 1.2.7.1) using a FAT formatted USB stick. [] The Flashback process completed successfully (LED blinked for ~10 mins then stopped). Result: Even with the freshly flashed BIOS, the system exhibits the exact same failure immediately upon boot.

Note on Physical Condition: During the troubleshooting process (specifically while removing the GPU to isolate the issue after the instability had already rendered the system unusable), the small plastic retention clip on the PCIe slot detached. However, the system's failure persists exactly the same way without any GPU installed (using the onboard iGPU and bare-metal testing), verifying that this is unrelated to the root cause of the failure.

Conclusion: Since the system degraded from a stable state and now fails to output video or power USB devices even after a successful BIOS Flashback (despite a Green Boot LED), I suspect a physical failure of the Motherboard's I/O controller or traces.

Has anyone seen this specific "Green LED but Dead I/O" behavior on the X870 platform? I am preparing to RMA the board but want to be sure I haven't missed anything.

Here's a video of the way it boots.

Sleep/wake issues are a nightmare to deal with. Most repair stores I know just
disable the function when customers bring in PCs with issues to do with it.
The problem is that it could be anything from the BIOS to power issues to the OS
itself. Troubleshooting is almost impossible and more often than not, the issue
comes from Microsoft and some badly written, rushed update. I can't count the number
of times a windows update broke my sleep and/or hibernate function.

One thing I tend to do when dealing with issues like this is create a linux live
boot USB and test under something like Ubuntu (well maintained distro). If it
works under linux then the issue is with windows.

Sorry I can't offer more tips.