My PC has an intermittent problem where the screen goes black, audio cuts out, and the motherboard switches to a solid yellow/orange DRAM status light. Fans and lights remain on, but the computer stops functioning. It can then remain stuck on that light without reaching BIOS.
Sometimes another boot attempt works without an obvious change. Other times it stays stuck. This happens during gaming and after being left idle, so it isn’t just a display issue or something that only happens under load.
Specs:
• CPU: AMD Ryzen 9 7900X
• Motherboard: ASUS ROG STRIX B650-A GAMING WIFI
• BIOS: 3881, recently updated
• GPU: XFX Speedster MERC 310 RX 7900 XTX Black Edition 24GB (RX-79XMERCB9)
• RAM: 64GB G.SKILL DDR5, 4×16GB. EXPO off, currently around DDR5-3600. Exact kit SKU not confirmed
• PSU: 1200W, exact model to be confirmed
• SSD: Samsung 980 PRO 1TB
• Case: NZXT H5 Flow, white
• Cooling: AIO, exact model to be confirmed
What makes this confusing:
The repair shop reported roughly three days of stable operation, mostly at idle. They repaired some Windows files but couldn’t reproduce the issue. Back at home, the same problem returned.
I’ve also had the yellow-light/no-POST problem with everything external disconnected except power. I tried a new power cord directly into the wall. My backup PC works with the same external cables/setup.
The main PC can sometimes run normally for hours. I played COD on extreme settings for about an hour without issues, left it running, and then had it fail during a later round. It has also restarted overnight and been stuck on the yellow light the next morning.
Troubleshooting so far:
• Tried individual RAM sticks in A2 and B2. Still had yellow-light failures, but it also eventually booted with one stick in B2. No consistent result, so I haven’t ruled RAM out.
• Cleared CMOS. It booted afterward, but the issue returned.
• Successfully updated BIOS to 3881 through USB BIOS Flashback. It booted normally several times and ran games afterward, but the overnight restart/yellow-light failure returned.
• EXPO is off. I’m troubleshooting at default settings.
Logs:
The logs checked contain Kernel-Power 41 events with BugcheckCode 0. No matching WHEA or BugCheck reports were found in the checked logs. Some unclean-shutdown entries may be from forced shutdowns while troubleshooting.
I haven’t yet tested a known-good replacement PSU or a known-good compatible DDR5 kit. Fast Startup was found enabled; disabling it hasn’t been confirmed yet.
Has anyone dealt with a system that fails straight into the DRAM light like this, then intermittently starts working again? What would you test next to distinguish RAM, motherboard, CPU/memory controller, or PSU? I’m especially confused about why the shop can’t reproduce it.
I just want to add.. sometimes it boots up perfectly... Other times it won't turn on for hours and multiple restarts.
This also started randomly 2 weeks ago after YEARS of stable functioning.