Initial startup functions briefly, then shuts down and only powers on for a moment.
Initial startup functions briefly, then shuts down and only powers on for a moment.
Hello everyone, I recently assembled my new PC with these specifications: MOBO: MSI PRO Z790-P WIFI RAM: D532GB 6000-36 Vengeance SSD: SSD 1TB 5.0/7.0 G 980 PRO M.2 SAM CPU: Intel i5-13600KF 3500 1700 GPU: Gigabyte 8GB RTX 3070 OC PSU: BeQuiet Straight power11 CM 850W ATX24 CPU fan: be quiet Dark Rock Pro 4 Case: BeQuiet PURE BASE 500DX OS: Windows 11 Pro I installed this system yesterday. For a short time after turning it on, all fans began spinning and the LEDs activated. However, when I moved my keyboard, mouse, and monitor to another room, the PC shut down. Restarting it occasionally brought it back on for just a moment—lights flashing and fans spinning briefly. This morning, after checking everything, I restarted again (no changes since last evening). Everything functioned normally: fans ran, BIOS loaded correctly, components were present, and installation proceeded without errors. After booting into Windows 11 via USB, I encountered the same problems—PC would turn off unexpectedly. I tried removing the GPU, swapping RAM slots, re-seating the CPU, but the issue persisted. Now I’m concerned about the power supply unit. Any advice on what to do next? Thanks!
There is a option in BIOS (don't remember what it's called) that simulates load on the PSU so it doesn't shut down under low load. This could be the problem though if you have another PSU on hand, try using that instead. I can find out the name of that bios option as soon as i get home in around 6 hours.
I don’t even have time to update the BIOS (perhaps if I leave it idle for two hours I’ll get another minute). The only other power supply I own is 450W. Maybe I should test that one without connecting the GPU.
We need to reposition the 24-pin connector and inspect for any damaged pins. Also, what do you mean you’re not home? Perhaps the power cable from the PSU isn’t secure or fully connected—check if it’s plugged into the correct outlet. You might want to use a power extender or try a different wall socket.
I replaced all connectors, no broken pins detected. I relocated it in another area of the house, but nothing changed. Used a plug extender and didn’t enter BIOS—just a brief power-up (video). VID_20230302_101750.mp4
Visited the store; the salesperson was hesitant at first, but after using their testing tool, the PSU tested negative and became defective. Received a replacement, and everything now functions properly. Planning to hold off on overclocking until further notice. Thanks to everyone for your quick replies—it really helps!