The PC fails to start following a brief overload.
The PC fails to start following a brief overload.
Good evening
I just assembled a new PC, and everything functioned perfectly.
In my case, it came with a fan that had a Molex power supply, but I didn’t have a matching Molex connector for the PSU.
So I decided to use an adapter that connects Molex to PCIe (originally meant for powering a small GPU from a Molex supply), and connected it directly from the PSU to the fan.
Here’s the link for reference:
https://www.ebay.fr/itm/23528807441
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My mistake was clear—I tried to power on the PC, and it would turn on instantly but then shut down very quickly. After a few seconds it would start again, but then stop immediately.
I’ve already tried several fixes:
- Unplugging everything and reconnecting,
- Connecting only the motherboard and GPU, which let the PC boot without issues,
- But once I plugged in the CPU (8+4-pin), it failed to start again.
I also noticed a faint clicking sound from the PSU when it powered off after the CPU was connected.
I tested all RAM units individually on each slot and followed the checklist from the forum.
From what I’ve gathered through searching, the three unknowns are the PSU, the motherboard, and the CPU.
I don’t have any spare parts for all three, but I’ll try to acquire them.
Thank you in advance for your advice and support.
If you're fortunate, you merely damaged the PSU. The pin arrangements on the PSU connectors aren't typical—the makers build them as they see fit, while the other ends of the cables remain consistent (which is why you must always use the ones supplied with the PSU). If you linked a third-party molex adapter straight to the PSU, the voltage/ground connections would almost certainly be completely wrong, potentially damaging the unit. Only testing another PSU can clarify the issue.