Light on but screen remains dark
Light on but screen remains dark
Full specifications would be useful. CPU temperatures seem normal during boot, but the white light might differ on other boards. Debug LEDs aren't necessarily uniform across brands—consult your motherboard manual. Are you using multiple debug LEDs? (This is common.) If so, which one is illuminated? (BOOT, CPU, RAM, VGA...)
We constructed the system over two days and since then, the only activity was accessing the interface to install games. The machine would shut down as if entering sleep mode, with the RAM lights still on. At first, we assumed it was the CPU because we purchased a 3-gen processor for a 5-gen model without updating the BIOS. After updating, the issue persisted during benchmark tests. We ran a test and observed crashes immediately after loading RAM, initially thinking it was the CPU. We checked temperatures—34°C on BIOS and 50°C during Red Dead Redemption launch—and then the PC shut down again. We repeated the benchmark to identify which component triggered shutdowns. Eventually, removing the GPU and its cables helped, and the system restarted without a white light flashing on the CPU RX 3060 12 GB. The setup included an ASUS TUF Msi B550 Pro, an Intel Ryzen 5 5600, a 850W PSU, and 16 GB of Aorus RAM.
verify cpu pins to confirm none are damaged, take all out unless needed to check the CPU LED. Use just one RAM stick, skip GPU and drives, plug in one at a time and test each separately. If it works, re-flash the BIOS. Otherwise, remove everything and try again outside the case. If nothing functions, compare parts with other boards or CPUs to identify the real issue.
It seems like the main concern was overlooked, as shown by the outcome, yet the focus shifted to a CPU problem. At the start, it looked like a RAM issue was the real cause.
I made a few adjustments to your note. The benchmark begins at RAM, everything appears normal, then CPU checks out, followed by GPU, and shutdown occurs. I clarified that you didn’t mention a CPU problem—just noted the motherboard showed white light near the CPU, and the RGB LEDs on RAM were visible while the motherboard stayed off.
The white light remains on means the board isn’t progressing past the CPU initiation. You’re asking about the testing sequence—starting from RAM, then CPU, then GPU. The LED stuck suggests CPU issues, but you noted failure at RAM. During benchmarks, it seems GPU performance is also problematic.
After reviewing your message several times, I believe you grasp the idea. I would proceed with testing first—remove all except the CPU, use one stick of RAM, see if it passes the CPU LED. Try different slots and sticks, and if it still hangs, inspect the CPU for bent pins.