Tom's Hardware > Forum > CPU & Components > CPUs > Biostar TA790gx 128m cpu fan wont spin but mobo will post

Biostar TA790gx 128m cpu fan wont spin but mobo will post

Forum CPU & Components : CPUs - Biostar TA790gx 128m cpu fan wont spin but mobo will post

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prelude2250   09-04-2009 at 03:14:08 AM

so any ideas? I just got this motherboard (Biostar TA790GX 128M) today. However it was an open box item from newegg. I have purchased quite a few open boxes from newegg with no issues. Basically I want to make sure I'm not overlooking anything before I send it back. Also I'd like to mention the same fan will work on the other fan ports, the motherboard post and works fine (except the cpufan of course), and I have cleared the cmos. Still no go. I have also tried a 3pin & 4pin cpu fan. This is my first AMD build so I just want to make sure that i'm not overlooking anything. Thanks.

p.s. I have a PhenomII X2 550 cpu and a generic 1gb stick of 800mhz ddr2 just to test with.

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Bronze CPUs badge GhislainG   09-04-2009 at 04:54:29 AM

I'm not familiar with that motherboard, but on a Biostar T45 motherboard, the CPU fan can be configured to start only once the CPU reaches a predetermined temperature. Connect the fan to another header to keep the CPU cooled and check the CMOS configuration. If that doesn't work, then you might have a defective motherboard.

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prelude2250   09-04-2009 at 04:58:25 AM

yeah I set the mobo to shut off at 50c and the cpu fan did not turn on before 50c. I also discovered that out of 3 fan ports only the rear system fan port works. : (
no cpu or front system fan

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Bronze CPUs badge GhislainG   09-04-2009 at 05:17:39 AM

You now know why the previous buyer returned it.

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prelude2250   09-04-2009 at 05:21:42 AM

I guess so. lol I guess i was bound to get a lemon open box eventually.

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