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AMD FX 8350 stock fan not working

Kind of a long story, but I'll try to keep it short without omitting anything important.

So basically I gave my sister my old PC after I built myself a new one. It has a Biostar T-Force 550SE motherboard with an AMD Athlon 64 X2. We had to get a new PSU (Logisys 480W, not sure of the model number) because the one I was using with the system died.

Anyway, she started having problems with the PC shutting itself down. I suspected it was overheating and had her monitor the temps. She found that the processor cores were getting up to 65C, which is the automatic shutdown temp. So now we've taken it apart and I tried switching the Athlon's stock cooler for my FX-8350's, but the fan isn't spinning when the computer is turned on. I find that strange since the Athlon cooler's fan was spinning. If I detach and reattach the power connector for the fan, it will spin for a few seconds and then stop.

At that point I began suspecting the power supply and switched it out for my Corsair TX650 just to test, but the CPU fan still isn't spinning and the PC is shutting down after just a few minutes (not even enough time to boot into Windows and see what's going on). I'm starting to think the motherboard may be to blame. Any ideas?
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More about amd 8350 stock fan working
  1. Sounds like a motherboard issue can be caused by Logisys which is about the worst PSU shaped object there is.
  2. rolli59 said:
    Sounds like a motherboard issue can be caused by Logisys which is about the worst PSU shaped object there is.

    Haha, yeah my sister's husband chose the PSU and I think he just went with the cheapest option. I probably should have been more explicit about which brands are reliable.

    So are you saying that the PSU may have permanently damaged the motherboard? Because like I said, I tried it with my Corsair PSU and same problem.
  3. +1 lol
  4. You won't know if and what with the damage till you fit another psu.
  5. Best answer
    rdfiasco said:
    rolli59 said:
    Sounds like a motherboard issue can be caused by Logisys which is about the worst PSU shaped object there is.

    Haha, yeah my sister's husband chose the PSU and I think he just went with the cheapest option. I probably should have been more explicit about which brands are reliable.

    So are you saying that the PSU may have permanently damaged the motherboard? Because like I said, I tried it with my Corsair PSU and same problem.


    Based on that it is likely the board since the cooler fan should run.
  6. try to plug the fan in another board and see if it spins it may just be a dead cpu fan after all its not impossible?...
  7. i7Baby said:
    You won't know if and what with the damage till you fit another psu.

    Like I said, I hooked up a known working PSU and the fan still wasn't working right.

    Anonymous said:
    try to plug the fan in another board and see if it spins it may just be a dead cpu fan after all its not impossible?...

    Yeah, I guess I'll give that a shot. I'll update once I've tried it.
  8. Ok, so I plugged the fan into my board and it worked fine. It's still sketchy on the Biostar board, though, and the machine won't stay on longer than about a minute. So this probably means the board is fried, right?
  9. That would be my guess based on the troubleshooting.
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