I exchanged the power cords for the modular PSUs, but my computers aren't working anymore. Did I damage something?
I exchanged the power cords for the modular PSUs, but my computers aren't working anymore. Did I damage something?
I aimed to swap my Rosewill 750 W PSU from one build (Build A) with a Corsair 650 W unit from another build (Build B). Both setups worked before the change (Story spoiler: they stopped working afterward).
I connected a CPU 8-pin cable from the 750 into the 650, though I later realized it wasn’t recommended due to lack of standardization. Live and learn, right?
From what I gathered:
- I heard a click in the 650 W PSU when trying to power it on inside Build A, but nothing further.
- A paperclip test on the 24-pins showed both PSUs started spinning up.
- I think I connected everything correctly to the motherboard.
- After that, both PSUs failed to power on again.
- There was a faint buzzing noise from the 750 PSU when attempting startup in Build A.
So, how significant is the issue?
It's disappointing to hear that the PSU is likely damaged. However, the rest of the equipment seems to be functioning properly. The fans might still be operating because they aren't drawing power from the faulty 12V rail on the PSU. If any components were affected, it would probably be limited to the motherboard.
They're both in trouble, it seems. The power supply unit and the motherboard might be failing together.
There's no way to know without testing the parts. CPU, motherboard, and PSU are certainly the likeliest things to be destroyed.
If the PSU doesn't work on the unaffected machine with all the correct parts -- assuming you didn't use the wrong cables there, too -- then the PSU is likely dead. The question then goes to whether the CPU and/or motherboard are fried.
Simplify your setup by testing the build separately on an external non-conductive surface, such as the box the motherboard is shipped in.
What version does the other board have? You might face problems with BIOS updates unless you're using a more recent version of the Ryzen CPU. If your processor is a Zen 2 or 3, that's what you should be aware of.