Black screen on PC, then restarts.
Black screen on PC, then restarts.
I recently enhanced my computer and donated the older components to my younger sibling. We then assembled a new system using those parts plus a few modern replacements. Those occasional black displays were an issue before, but now they seem more common after this upgrade. You’ll notice the PSU turning on and off abruptly whenever it happens. You can also trigger the problem by gently hitting the desk. The components I kept from the old build were: motherboard, ASUS ROG STRIX Z390-H CPU, i5-9600k processor, Cryorig R1 Ultimate WiFi card, and Intel AX200 chipset. New additions include: PSU: Fractal Ion Gold 750w, GPU: ASUS TUF 4060Ti, 8GB RAM: G.Skill Trident Z Neo 2x16GB at 3600MHz (one old RAM failed), and Windows 10 Pro. The issue appears at normal speeds and without XMP enabled, whether the system is under stress or idle. The motherboard has switched three PSUs (an older 600W GTR, an EVGA G3 750W, and now the Fractal), three GPUs (2080, 3080, 4060Ti), and the RAM has changed from Corsair Vengeance LPX to new 2x8GB at 3600MHz. Despite all these changes, the problem remains consistent. I’ve run fresh Windows updates, updated the BIOS recently from ASUS, and reworked the CPU multiple times. Drivers are current. No events appear in the event log except for an unexpected power cut. At this stage, I’m unsure if it’s a hardware fault with the CPU or motherboard, though others might have suggestions.
It seems like a brief physical touch. Make sure all motherboard standoffs are in place and the GPU is properly seated. On mobile, keep it short.
Completed testing and observed issues when pushing on certain standoffs. It appears the problem may relate to the motherboard rather than the GPU. I plan to run the PC without those two standoffs and will follow up. Also, gave the GPU a gentle shake—no black screen detected. Thanks for the response!
It's difficult to identify the issue from a distance. Possible causes include the motherboard making contact with other metal components inside the case, possibly due to an internal short on the PCB that's hard to spot. The motherboard might need replacement or a return shipping label for a part that's being moved and touching something. A surface-mounted component could be faulty or the solder joint might be failing. There could also be a defect in the standoff mounting point causing a short circuit to ground. The safest approach is to disassemble everything and carefully examine the motherboard for any damage before reassembling, paying special attention to mounting areas or omitting them entirely.