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中国DOS联盟论坛 » 其它操作系统综合讨论区 » [Help] A strange motherboard problem??? View 859　Replies 7
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Original Poster Posted 2003-06-13 00:00　·　 中国 江苏 扬州 高邮市 电信
pizigao
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When I powered it on today, the CPU fan and case fan connected to the motherboard both stopped working at the same time!!! (There are two 3-pin fan headers on the motherboard. I tried swapping in a good fan, and it still didn't help.) My initial conclusion is that the two 3-pin fan headers on the motherboard aren't supplying power, but they couldn't both fail at the same time, could they?? Please have an expert give the reason and a solution. (Don't just say it's a motherboard problem and tell me to replace the motherboard!!! :））
Floor 2 Posted 2003-06-13 00:00　·　 中国 香港
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Can the machine still boot?
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Floor 3 Posted 2003-06-14 00:00　·　 中国 江苏 扬州 电信
pizigao
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It boots and works normally!! I measured with a multimeter, and both 3-pin fan headers have voltage (12V)?? Why is there power, but neither fan spins???? Could there be a problem in the power supply circuit!!!
Floor 4 Posted 2003-06-15 00:00　·　 中国 广东 茂名 电信
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Why not just connect the fan's power cable to another power connector?
Floor 5 Posted 2003-06-15 00:00　·　 中国 香港
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The following is quoted from pizigao at 2003-6-14 13:06:55:
It boots and works normally!! I measured with a multimeter, and both 3-pin fan headers have voltage (12V)?? Why is there power, but neither fan spins???? Could there be a problem in the power supply circuit!!!
Have you tried testing the fan on another machine?
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Floor 6 Posted 2003-06-16 00:00　·　 中国 江苏 扬州 电信
pizigao
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I already tried that, it's not a fan problem!!!
Floor 7 Posted 2003-06-16 00:00　·　 中国 河北 唐山 联通
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Take the motherboard out and check whether there are any bad solder joints on the back. In this kind of situation, there's really no other way besides checking it yourself.
Floor 8 Posted 2003-06-18 00:00　·　 中国 广东 汕头 电信
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It's possible the fan control IC is bad. Either send it in for repair, or buy a fan that connects to the power supply connector.

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