PC stops working unexpectedly, no display, no power to external devices but fans and RGB lights remain active?
PC stops working unexpectedly, no display, no power to external devices but fans and RGB lights remain active?
Hi there, I’m still getting used to English and I hope I didn’t say anything wrong! My PC has been shutting down unexpectedly, especially under heavy use or during stress tests with OCCT. There’s no warning, the video stops instantly, power to peripherals drops, the CPU fan runs, and the case fans stay on. The RGB lights stay lit too.
The issue started when I ran the Nox emulator or played games like Destiny 2, and now it happens even when just watching YouTube or browsing—no heavy workload. I use the PC mostly for work, and Visual Studio doesn’t seem to cause this either; I play on my PS5. The PC stays on almost all day.
I built it myself about a year ago. I’ve tried several fixes:
- Disabled XMP
- Changed power plan to limit processor performance
- Reset BIOS defaults
- Performed a full BIOS flash
- Stress tested OCCT but didn’t find anything specific
Specs:
- Ryzen 7 5700G
- Aorus A520m Elite (latest BIOS F15d)
- 16GB RAM (2x 8GB) XPG Spectrix D50 DDR4
- NVMe XPG Spectrix S40G 512GB
- WD Blue 500GB
- Corsair CX450M (main suspect after reading many forums, got it due to budget constraints)
Other notes:
- No dedicated GPU
- No overclocking
- Temperatures are around 45–48°C at idle, 65–70°C under load
- Stock cooler works fine
After this happening three times in a couple of hours, I’ve been using HWiNFO to monitor the PC sensors. It’s been running for nearly two hours without any problems, so I’m not sure what’s causing the issue.
I’m thinking about buying a new power supply unit, but I’d appreciate some advice from the online community.
Your English is acceptable. Following the next successful boot in Reliability History and Event Viewer. Either one or both might be recording error codes, warnings, or informational events just before or during shutdowns. More errors and different types of errors also raise concerns about the PSU. This is particularly true if the PSU has been heavily used for gaming, video editing, or mining. Reliability History is more user-friendly and the timeline format provides clear insights. Event Viewer is more difficult to navigate and interpret. P.S.: Take your time. Don't rush, make notes and review the technical details. The information might be useful or not, but it could still be a hint.
There are any updates regarding fixing these issues? I'm currently facing similar problems.