Hi folks,
Reposting this, as I originally posted in the wrong section, which is likely why it got no responses, so I'm trying again in a more applicable section. I'm posting on an iPad, by the way, so for some reason I'm unable to add tags, if that matters.
So my home build died after about eight months of use. The PSU is a Seasonic X-750. (Not listing the rest of the specs, as I tested the PSU outside of the build, and the system worked for eight months prior, but can do so if requested.)
I turned the computer off one night and when I tried to turn it on the following morning it wouldn't so much as blink. Lights on the memory card reader and motherboard stayed lit, but I'm well aware that a busted PSU could produce enough voltage for that effect. When I turned the system on the CPU cooler fans would spin for a second and then stop. Same with the fan on the PSU. I've had broken PSU's on old systems, so it was my first guess. I'd never used a multimeter though, hence why I'm here!
So I shorted pins 15 and 16 on the 24-pin motherboard connector and went to testing. (Also tried pins 16 and 5 on a subsequent test, just in case.) The ONLY pin that gave me a correct result was pin 9, at 5.09V, which is a powered pin and gave me a result whether I shorted pin 16 and a ground or not. Almost every single other pin gave me a result from 0.00 to 0.01. A few pins (10 and 11, perhaps a few others) gave me minuscule readings (in the mV range) that continually decreased over time - perhaps why the fans start and stop?
I'm nearly positive this means the PSU is bonked, despite being a fairly young unit, but I can't make heads or tails of the readings, particularly the decreasing voltages. Did I err somewhere, or is the consistent 5.09V reading on pin 9 enough to tell me to RMA the thing and not give it another thought?
Thanks for all responses and let me know if I need to give more info.
Reposting this, as I originally posted in the wrong section, which is likely why it got no responses, so I'm trying again in a more applicable section. I'm posting on an iPad, by the way, so for some reason I'm unable to add tags, if that matters.
So my home build died after about eight months of use. The PSU is a Seasonic X-750. (Not listing the rest of the specs, as I tested the PSU outside of the build, and the system worked for eight months prior, but can do so if requested.)
I turned the computer off one night and when I tried to turn it on the following morning it wouldn't so much as blink. Lights on the memory card reader and motherboard stayed lit, but I'm well aware that a busted PSU could produce enough voltage for that effect. When I turned the system on the CPU cooler fans would spin for a second and then stop. Same with the fan on the PSU. I've had broken PSU's on old systems, so it was my first guess. I'd never used a multimeter though, hence why I'm here!
So I shorted pins 15 and 16 on the 24-pin motherboard connector and went to testing. (Also tried pins 16 and 5 on a subsequent test, just in case.) The ONLY pin that gave me a correct result was pin 9, at 5.09V, which is a powered pin and gave me a result whether I shorted pin 16 and a ground or not. Almost every single other pin gave me a result from 0.00 to 0.01. A few pins (10 and 11, perhaps a few others) gave me minuscule readings (in the mV range) that continually decreased over time - perhaps why the fans start and stop?
I'm nearly positive this means the PSU is bonked, despite being a fairly young unit, but I can't make heads or tails of the readings, particularly the decreasing voltages. Did I err somewhere, or is the consistent 5.09V reading on pin 9 enough to tell me to RMA the thing and not give it another thought?
Thanks for all responses and let me know if I need to give more info.
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