Question about the fan header.
Question about the fan header.
I have an old setup I uncovered and began experimenting with. The issue involves a few fan headers that aren’t functioning properly, though I suspect there might be a solution. It’s worth checking with others before finalizing. Otherwise, the main board appears to be operating correctly. When using a multimeter, I can see continuity between the 12V+ pin where the ATX cable connects and the 12V pin for the working fan headers—but when inspecting the faulty connections, it doesn’t match my expectations. If I’m certain the short is in the fans themselves, not elsewhere on the board, can I simply connect a direct wire from the 12V pin to those headers to restore power? I’m confident in my soldering skills, but this process seems standard.
In theory, fans would likely operate in PWM mode (or run at maximum speed) depending on the board’s age—there’s a good chance it doesn’t support PWM. If running at full speed, consider using a Molex/SATA fan header instead of soldering. The real reason to solder might be if a component failed; then the voltage regulator for the fan headers is likely at fault. When repairing, handle it properly and replace the regulator rather than connecting directly with +12V. If there’s a short circuit, avoid this approach—it means power is going to unintended places, so trace the issue instead of trying to bypass it.
What kind of motherboard you're running and which fan connectors are missing. You'll notice a tiny black rectangle beside the fan ports, often labeled with model details for ordering parts from suppliers like DigiKey.
Could you propose a more straightforward option? Do you have a working fan header already? Just purchase a powered fan hub and link your fans to it.
I'm familiar with that. It's quite an outdated model, mainly used as a way to attempt repairs. Made in 2010
This model is quite outdated now. I think the CPU fan and CPU settings are likely the issues.
Have you attempted to configure those headers in the BIOS? Consider using DC/PWM (when PWM is supported), fan curve settings, or alternative modes.