Case fan problem

[Digiface]

I got a problem with my quite new case fan. It hasn't started to spin couple of times, when i have started my computer. It's rear fan and connected to PSU. Can the problem be in fan itself or in PSU/power intake or something...?

Haven't got similar problems with my front fan, which is same model and been longer in my computer. It's connected to MB.

PSU that i got is Nexus Silent 300W. I got this fan (8.7dBA): http://www.scythe-usa.com/product/acc/002/sflex_detail.html

[Dr.Khron]

Sometimes the sound dampening materials in the bushings add a little extra static friction... does it start spinning if you flick it with your finger?

If so, it may break in with use...

Otherwise, you'll have to replace it. I'd be very concerned about a fan attached to a power supply.

[Digiface]

does it start spinning if you flick it with your finger?

'd be very concerned about a fan attached to a power supply.

Haven't tested. I test it next time and inform here.

Well of course it's not directly connected to PSU. It's connected to connector coming from PSU. There's only one PIN connector for case fan on the MB. Well there's a second PIN, but it's for CPU-fan.

[foxyshadis]

Do you happen to know if the fan header coming from the PSU is 12V, 7V, or 5V? While nearly all should be 12V, occasionally they'll be fiddled to lower fan speed and volume. 5V generally isn't enough to start a 120mm and just barely enough for 96mm, while 7V is just barely enough for 120 and occasionally won't start, especially if there's any dust buildup. (So I clean my server's fans every few months.) 12V should be plenty, however, and if it doesn't start with that, something's sticking. You might consider popping the top sticker and adding a drop or two of mineral oil (no more!), if it's a ball bearing fan, since the bearings haven't yet seized if it works at all. If it's sticking because of some physical deformity, it's probably too late for it and time for a replacement.

Since it's new, I'd ask if it could be replaced under warranty with the shop you bought it from.

[Digiface]

Do you happen to know if the fan header coming from the PSU is 12V, 7V, or 5V?

if it's a ball bearing fan

It's connected to PSU molex-connector (using PIN to molex adapter). There's no 3-pin connectors on my PSU.

It's got Fluid Dynamic Bearing.

I got this PSU: http://www.silentpcreview.com/article56-page1.html

[Digiface]

Well, it start to spin, if i help it a little. Never noticed it to stop while computer is on, though.